I like stamina.. I did 10 legendary instances this morning, +30% daily bonus +100% 30 minute recharge and I got roughly 100,000 exp. That isn’t too shabby.
If you get rid of stamina, you’re going to need to nerf the exp from instances and that would be much worse.
Overall I feel that stamina levels the playing field. Not every player can play 8 hours a day.
Right now I think the biggest problem is the limit of military exp. I’m not saying we should go back to the corsair system, although doubling the military exp drop frequency would still give it only 1 out of 7-9 times and that would be fine. Frankly, that benefited maybe 10 players. What I would like to see is ANY war giving 2 x military exp. Keep the 3 x military exp during planet competitions (maybe increase them to 3 or 4 times per week).
Lastly, this is for ALL players: stop being so afraid of fighting! You can now build freaking fleets of ships in hours. Your buildings produce oodles of resources. USE THEM!