I know this is a very specific question, but does anyone know anything like this?
What I mean by "like TAB" is that it's an RTS and/or citybuilder where you're constantly under attack from all sides, and taking + holding more of the map is the primary thing that enables you to progress in the game.
Age of Darkness is really fun and I know another update is in the works but I've already played it to death much like TAB. Alien marauder just felt like off-brand TAB and I got bored of it after beating each map once.
Tried both of these, while fun they aren't quite what I'm looking for. Riftbreaker is definitely on a higher level then DINAO.
I would say go for it, AFAIK the game is mostly complete (IIRC only big things left are the last 3rd of the campaign and faction-specific models for buildings, possibly multiplayer) and while the bugs can be pretty bad they aren't very common, usually get fixed quickly, and tend to only occur after major updates. Nothing I would consider inappropriate for an EA game at it's stage in development.