I know its alpha but still we could discuss those reinforcements. I would suggest two things:
Double the reinforcement time for t2 and multiply with 4 for t3. Its ridiculous, t3 bot in game = 90% free win.
I also would suggest to limit reinforcements on some planets. Id love to have some planets where i can attack and know, noone will have reinforcements.
Another idea: Make an alarm for the players. The reinforcements are coming from the outside of the map, so the players should be warned that reinforcements are inbound. Its something you cannot scout, therefore it should be warned about it.
But right now i feel like playing without a t3 bot is wasted time