One thing that makes it hard for me to not play Advent is that their mothership has amazing abilities with the colonize, and it's colonize is frankly overpoweredly good(well really the others are underpowered and practically not worth the points :/).
20% discount on the planet at lvl 1, then 40%, then 60%. I actually find this skill VERY worth 3 points, and just don't bother with the extra damage skill(I want the AM for regening shields anyways). Shortly into the game i'm getting a 40% discount on the upgrades. That saves me about 2-3k credits, hundreds of metal and am. This makes such a gigantic difference to me.
With Vasari you get faster build time, and free extractors with tec. WHAT THE HELL?.. Seriously. :/ Oh so tec saves 200 or an extractor, or 400, if you level it past 1.(assuming you have 20% discount from getting lvl 1 on their early skill that cheapens them. It's worth one research level at least as after 9 extractors it pays for itself). Vasari get faster build time.
These totally don't compare at all to Advents awesome colonize. The others badly need a buff imo..
I've figured out how to play Tec.. a few factories up close and lots of orbital refineries/trades. Lots of civ to get that +8 civil on every planet early. +8 civ is practically overpowerdly good on all planets. Way better than advents +4 tac. Does Vasari even get something similar? Another strike against them

Still having trouble liking Vasari when I really want to.. I'll try a bit more.
And yeah, tech rushing to returning armada doesn't work well in MP. Maybe it'd work on a map like gateway.
"Phase Stabs are just so expensive, and come late in the game, that I don't find too much of a use for them."
Exactly. Too much damn crystal, too much damn tac. Do they have a +tac on all planets research like advent which makes vasari suck more, or am I missing the research for it? :/