I would say the biggest problem TA had was simply lag. Once you really get going with the volume of units - especially over a network - the loads on the system can get heavy.

There’s a new iteration of the franchise - Planetary Annihilation - that I’ve been meaning to check out as soon as I have some free time. Good reviews on Steam. Stick it on your list and wait for a sale, if the $30 price point bothers you. But I think it’ll probably look a little nicer and run a little smoother.