I haven't played Tali too much since the 2.57 changes, but I think it's getting towards some decent balance, and there are more changes coming, according to Discord. My one suggestion would be to consider giving the USSR +100 tickets over the Finns.
On most other (if not all?) conquest assault-style maps, the attacking team has a small ticket advantage over the defenders (even on Luttich, where the two teams often reach parity quickly). I think this would give the USSR a bit more of a chance to get the map going, and, comparatively, make them need less time to defend once they get the ticket bleed.
This may or may not be necessary, depending on how the balance goes after these updates. Just something I thought to mention.