When hovering over a foe/Demigod, it should display their health/mana, either as a popup, or to the right of the foe you're attacking at the top of the screen. I'd like to be able to kill the lower health mobs before the higher health mobs so I take less damage. It'd create a tiny bit of depth. Just as well, if I hover over a friendly mob, I'd like to see what class he is. Currently, you can't click on your own mobs to see what they are or are doing, you can only guess or play for a while to learn what they do.
When having a skill active and aiming for a target to click on, it'd be nice if the mouse hover over flashes or blinks the mob/Demigod it would effect. I've played Regulus a couple times and accidently sniped a mob instead of a Demigod I was aiming for because I couldn't tell who the skill would hit.
When attacking a Demigod, you should see how much mana they have at the top. It would help to know whether somebody has the ability to cast a spell or not, creating a bit of depth.
The Demigod kills by teammates should be displayed more prominently. The text of when they kill someone gets lost behind the foe I'm attacking that shows at the top.
An option to permanently show my health/mana numbers on my bars.
A way to know what my armor, stun rate, attack speed, run speed is other than by clicking that icon at the bottom of the screen. Maybe a stats table/window.
There should be some sort of chart/table/icons on the left or right that let me know what the level is of my teammates, if they're being attacked, their health, their casting of skills, what skills they've selected, their armor, etc. It would help teamwork tremendously and a team would cooperate much more effectively.
Lastly, a listing of a k/d/a ratio of all players would be nice. I wanna know who to watch out for. 