It seems that what you are really arguing for is a better phase jump inhibitor, not a moving sb. With an improved pji, it doesn't matter which phase lane your sb is covering - the enemy ships still cannot jump further into your system until they take it out. And that pji might just be sitting next to your unmoving tec or advent sb.
I frankly am reasonably happy with the phase jump degredation of the current starbases. What I'm concerned about is combat in the local well, not bypassing fleets. Are you arguing for a PJI/PJI improvement in starbases that prevents jumping deeper into an empire?
Also, come on. This is a strategy game about hard choices. At some point you may just have to consider "sucking it up" and scrapping your old sb so as to build a new one covering the phase lane you wish you had covered in the first place. Another option would be to try to plan ahead and realize that if you build your sb at one particular phase lane right now, will you wish you had built it at another one later? This is what tradeoffs and strategy are supposed to be about.
Excellent point ... that's definitely a hard, interesting choice, and if all three factions had to face it I'd say it's all good. But it's hard to justify taking that agonizing decision from one of the factions and giving their base an almost infinite capacity to cover a well.
Why all the stubborness with moving starbases? They're starbases. They're not super-capitals. The Vasari one moves because they have no anti-structure ships. The TEC and Advent do. If you make all Starbases move, that's not balance because you aren't looking at the big picture, you're looking only at the starbases. If you're going to scream bloody murder about balance, at least consider everything? Imagine a moving TEC base with the self-destruct. Jump into enemy well, pop the starbase right on the edge, it'll be complete before the enemy fleet can move in to destroy it. Quickly upgrade it and self destruct. Boom, there goes enemy fleet and they can't do a damn thing about it. That's not balance, folks.
The Vasari one moves but its super-powers are defensive in nature (damage reduction, repair). It cannot be cheaply used to knock out an enemy fleet. The TEC and Advent ones (if the Advent gets changed to do hull damage with meteors, hopefully..) can be. Having them move will make balance much worse than it is now.
Annatar: solid point; I hadn't thought of the danger of self-destruct being used offensively. The way it's currently balanced it only works on a stationary base (though if the base moves really really slowly etc it may only have to be gently rebalanced - see the end of this post).
I'm not sure what you mean by "you're looking only at starbases." And I don't mean to scream bloody murder; I don't think the game is totally broken and not fun to play as the other factions but I do think the balance is a bit out of wack. What I'm proposing is more of a tweak than a fix.
Vasari base, cannot cheaply engage an enemy fleet; this is true. But a Vasari player gets the invaluable guarantee that any fleet that jumps into the base's well WILL have to face down the base if it doesn't hustle out fast (and hustling out means phase jump degredation). TEC and Advent bases can't wait to gun down the enemy fleet but they're forced to sit and wait for the enemy to come to them. Meanwhile, the enemy is bombing the planet to rubble, torching all the orbital structures, dropping mines, and getting torpedoes in position just outside the firing range.
A bird in hand is worth two in the bush, but a starbase that can reposition to where it will be useful is worth four bases sitting in the shadow of the battle playing solitaire. : )
And just to reiterate, I support what Dargoon999 said:
Why not give TEC/Advent starbases an upgrade that will give them the option to move, but the speed should be half that of the Vasari starbase, plus the Advent/TEC starbases should have all their abilities/shields/weapons disabled when moving.
The TEC/Advent bases don't need to be able to chase down fleets in the heat of battle or be effective as offensive weapons. They just need to be able to move to confront the most threatening phase lane. They should move very slowly and only with prereq research done, and then they should be very vulnerable when moving. This would not dramatically change the meaning of what each starbase does but it would fix the aggravating way in which stationary bases get obsolete with time.