I do agree with OP, I don't think its a troll post at all and feel he has a point. Maybe instead of giving TEC and Advent free movement with the SBs maybe put them in a orbit that rotates about the said planet. You could make a tactical choice to have it short-medium-Long range Orbit depending on your stratagy you want to employ.
thank you for reading, and yes I agree orbits are another solution to the issue, and they are also interesting because there is movement. The thing is there is no reason to have a lack of control in this movement department, ships have to have thrust to keep them in orbit in the first place, so why not have a starbase under your control? More control means you have more options to bring in player skill. Also, being able to move your starbase is fun, you spent a lot on it, so it should have utility.
I like the idea that Vasari have a mobile and slow Starbase. I think that when TEC and Advent players set up their orbital facilities correctly and place the starbase in a defensive position relative to the existing orbital structures, their defensive capabilities are adequate.
Yep your key word is Adequate. The vasari starbase is an AMAZING GAME WINNER. All the other racial defenses are adequate, not even good, at what they do. I'm proposing an upgrade from adequate to good. The vasari still have their AMAZING GAME WINNER status. Everybody wins.
I can troll him because I am his father.
Still waiting on that coffee, dad. 
@ Toivoton
Well i'm going to respond to your post after the words
To the actual idea:
If you want an answer to the other parts, PM me.
Yes ogrovs are threatened by a vasari starbase closing on them and they may have to retreat once it starts bearing down on them. That makes sense, and should be true of all starbases. The defensive capability of the starbase would actually be worth the investment. As it stands, the other two racial starbases are just punching bags with little to no utility, because they can't move. Oh I might add that they are expensive punching bags(therefore they have little to no real reason to be built, and usually aren't until late game in multiplayer matches).
As for your vasari antistructure cruiser, they don't need one. the vasari have a simple tactic with their starbase that allows them to kill all support structures without risk.
step 1: build starbase in enemy gravity well.
step 2: upgrade starbase health and weaponry
step 3: move starbase into middle of enemy defense and kill all structures.
step 4:once all structures are destroyed, the vasari starbase can retreat and receive healing from a few overseers to face the opposing starbase/fleet.
Since the vasari starbase is such an awesome TANK, its going to survive easily in most cases. This is an easy strategy that takes little to no skill to execute.
Also, Vasari don't need a antistructure cruiser because They have strong phase missiles(kill anything quickly), excellent capitals(that spawn free antistructure ships), and a starbase that is very strong and able to beat any other starbase 1v1(with no support on either side).
The important aspect is that since the vasari starbases are stronger, they have far less RISK moving into an enemy formation to do this strategy. Think for a second about how a moving advent/TEC starbase would fare in similar situation(assuming they could move).
The advent starbase would be built at the edge of the gravity well. It would either strike buildings at a range and whittle them down very slowly with meteor (and yes it will be VERY slow). Or it could engage point blank and have a greater risk of destruction because 1) its really slow, so if an enemy fleet warps in it will have a far slower "reaction" time then a vasari starbase will have, 2) It isn't as resilient as the vasari starbase, 3) it isn't designed to be effective against buildings and lacks the weaponry to be so. The advent starbase would be feared because of its ability to entrap an enemy fleet and hit it with meteor.
Looks to me like the vasari starbase is a very effective building destroyer, with very minimal risk (aside from the initial economic investment).
The advent and TEC starbases aren't meant to brawl like this, the TEC starbase would incur the greatest risk because it is so slow, yet at the same time it could go in and blow an enemy fortification up with big red button. I personally would find this quite interesting, funny, and quite FUN(its kinda like, if you allow a TEC starbase to be built in your gravity well, it would be your own fault lol). Something about moving destructive starbase bombs seems to fit the TEC economic strategy. Nothing could clear a defensive emplacement faster. I'm sure the vasari would be jealous. Also, surprisingly enough, given the other races strengths, I don't find this ability to be overpowered, yet. Would it be fun? yes. Very fun for all races, actually. It sure would be a nice endgame bang to deal with a dug in advent/vasari defense. If you could get your starbase built in the enemy gravity well though. And thats a big IF when you consider the power of endgame fleets. Ogrovs would still have their use, and the TEC would be a bunch of bunker busters. This fits with thier "pure power" approach to things.
Giving yet another reason for the TEC loyalists to use their cheap, effective starbases. The only thing i would recommend is that the TEC red button blast radius be reduced to 75% of where it was before it was buffed in rebellion beta.
Also, if TEC loyalist starbases could move, they would actually have the strongest defense, instead of everyone pretending that they do, but then playing other races because the TEC loyalist defense sucks.
