I know that the desynchs and lag outs are the primary problem right now but I still have problems when I try to use leader powers. Sometimes they wont fire and just take resources like they did and sometimes when I go to activate them they with kick me from the leader power wheel.
examples: With hunters brand, I will activate the leader power on an army that I have line of sight on. However, if the line of sight moves, the hunters brand will not detonate but I will lose supplies and there will be a cool down as if it did.
If a leader power like a mac blast is telegraphed, I will try to use an atriox bulwark to negate it. When I click on the power to activate it however, the leader wheel closes as if I had clicked cancel instead of accept.
I also crashed a game by dropping a living barrier. not the same thought but I just want to throw it out there.