Check out Lady_Jade's power suggestion box, and see most of your ideas already in there. Take a look at what other people have suggested, and the format in which they've done it, and try your own hand at it! 
Let me never fall into the vulgar mistake of dreaming that I am persecuted whenever I am contradicted.
~Ralph Waldo Emerson
"I was just the one with the most unsolicited sombrero." - Traegus
I see a lot of posts about people wanting this proliferrated, that proliferrated, and whatever. I'm not a fan of proliferation, although I'm not saying I'm not glad it happened. I do have an easier time at having fun playing a brute with any of the scrap or tank sets than I ever would as a scrap or tank. Also, I'm just the type of guy that like vills better.
But, I don't like that people are happy settling for non-creative solutions to our endless hunger for more powersets. I want originality and most of all I want actual super-powered sets... AR and archery and broad sword and battle axe etc. are just fine, but they seem to keep adding weapon sets. As far as I'm concerned shields is just a weapon defense set... I know the shield isn't technically a weapon, but as shown in shield charge, it can be.
These are just my opinions, and now let the ideas fly!
My first wanted powerset is something the devs already have in the game, but for some reason, we can't use it: Rad melee! The shivans have it, all the set would need is a few more powers, taunt, and a pretty build up animation... I vote for the rad blast Aim animation cuz I think it looks cool. Also with that, of course, Rad Armor.
Also, an SG mate of mine, Taelsin, and I have talked a few times about gravity melee and armor... I think he said he even posted it around here somewhere.
Also, something a lot of people want to see... Psi melee and armor. Again, these sets the devs have parts of in the game already but they just need to be finished, and given to the players.
Now for control. How about these quick ideas:
Time Control. Kinesis Control. Traps Control (think of using summons like those in devices and traps but used for control purposes... like making a trap door in the floor or planting glue mines or whatever else you can think of. I know it's not super-powered like I want, but cool nontheless.). Electric Control. These are just a few creative ideas off the top of my head and can be used for trollers as well as doms.
I'm sure I could come up with other stuff... I'm just tired of typing at the moment. I just wanted to get these ideas out due to seeing post after post of stuff players want proliferrated and saying to myself "bleh!"
But these are just my opinions and I know lots of people love weapon sets. I don't dislike them, I just don't like them as much.
One more thing... I feel that everytime some sets get proliferrated, that's one less reason to play a different AT. Case in point, I wanted to make a DM/SR character... since I like vills better I'm not playing the blue side of the game if I don't have to, so why bother? Basically proliferration takes away from the uniqueness of every AT involved.