I loved the minion master class but the choices for pets weren't all that creative to me really and felt more like it was a bad guy only thing which i know it was for a long time.

bring back the minion master class with some new additions to what we can have.
mechanical or living animals we can summon and control
mechanical attack dogs or cats that can stealth,hunt and attack enemies in a pack,also dig up buried items and speed increase for enemies that you may need to chase down and capture.
other animal ideas could be birds like eagles,crows,ravens,falcons ect in living form or mechanical
the birds would have claw attacks,pecking attacks, scouting skill.
all mechanical animals could have these attacks and possible use of missiles or lasers for ranged combat.
the mechanical animals would include your usual verity of big attack dogs and the cats could be more of the jungle cat verity tiger,panther,lion, ect
the amount of minions could vary depending on how the Devs would go about it

I also enjoyed the spider soldier class with the backpack maybe add in a mobility feature with extending the arms so you can climb up buildings and other terrain instead of having to pick a super movement power if we want the option later on then we take it.

improved graphics would be great for the longest time CoH to me was dated because of the graphics and would be a lot better with a newer graphics engine of some sort.

action bar or control scheme could we have a choice in the matter ?
i liked how DCUO felt with some of the combat and movement and this could lessen the strain on players hands if they have problems like carple tunnel myself included.

add in optional morality systemr heroes or villian's to change sides
loved the customization in CoH being able to change and buy costume parts,change weapons and everything

some powers could have travel power uses
instead of the ice power just creating a ice slick to trip enemies this could be expanded into creating a ice path to ride on just like ice man does in the comics.
a power set that could use wind to create tornado's could use this to travel as well
super speed could run up buildings and run across water (don't remember if that was a thing in CoH )
add in movement speed boosts at later levels for all.

(I would've made this all seperate topics but thats a lot for me to keep up with lol )