There is a big problem with powers not triggering properly when they should. I've verified this with others, and its really taking the enjoyment out of the game. This is a lot more noticeable in ground combat, but space combat is where it really gets annoying.
What happens is, you are in the middle of combat, you trigger a power from your power bar, and.. nothing happens. It will sometimes do the warm-up flash on the icon in the tray before reverting to normal, other times nothing at all. Sometimes you end up down in 70% hull before realizing Emergency Power to Shields didn't activate, or your attack buff didn't trigger.
It seems normal weapon fire cycles interrupt actions, but whatever the cause, it's making powers unreliable and you spend more time making sure your ship follows your orders than having fun.
Others I've asked say it happens both when using keybinds and clicking the power directly, so it's not a direct UI issue.
What SHOULD happen is, when a power is pressed or clicked, it should be put in a one-item queue UNTIL conditions allow it to trigger, OR it's replaced by another player action. If weapon fire or some other action prevent it from triggering, KEEP it until the conditions are right.
If someone tries to activate Torpedo: High Yield while torps are cycling, do it AFTER they are done cycling. If your ground weapons special is activating and you try to swap weapons, QUEUE it and swap them AFTER the power has finished. And most importantly, if skills like Emergency Power to Shields are pressed, and they are not on cooldown, you had better make SURE it really activates properly.
In short, make us trust our powers are going to function when we press those buttons. Pressing them repeatedly just to make sure they activate in the heat of things is not fun, especially seeing as we are already busy with the space bar just trying to keep our weapons firing.