This is basically what the Epic/Patron power pools are for. Way back in the olden days of long ago, there were no ATs and people could mix and match power pools. It led to huge power gaps ranging from 'totally unplayable' to 'soloed the Sun.'
Having Vengeance and Fallout slotted for recharge means never having to say you're sorry.
1) First off, welcome to the game and to the forums!
2) Secondly, the game was a lot more like this in the Alpha stage of Development. However, it turned out that people could create Tank-Mages (high defense combined with high offense) or characters that were completely unplayable because they were too weak (characters with no offense at all). It was abandoned for the Archetype (AT for short) system that we have now.
3) Allowing people to make any combination that they wish will lead towards a lot of Tank-Mages, which means a lot of development time rebalancing the game. It's a lot more work than you might imagine.
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
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Im new to the game, only been playing 6 mos, and i noticed alot of the enemies you battle do not fit into the archtypes available to players. They usually display powers available to seperate archtypes. I would like to see these choices available to players. It would be cool to make a toon that was a combo Brute/Dom or Scrapper/Blaster. Im sure with a little thinking/planning this would not unbalance game play and give players more choices. They could call these special classes Deviants because they deviate from the norm. The more options available to the players will interest more people in playing the game.
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Once Architect goes live, head on over to the AE building and play a few arcs. We can do this with the Custom Critters we can put into missions. This should prove to you how powerful some of these combinations would be in the hands of the players. Normally, my level 14 Defender doesn't have much trouble with even con and +1 spawns. I was getting my butt handed to me by spawns of 3, even con, mutated, bunnies. BUNNIES!! I don't know what was more humiliating, that I was having trouble with even con spawns, or that I was being beaten down by bunny rabbits. 
Take those custom critters, and then think about how tough they would be if their powers were slotted, and had a human brain behind them rather than the game AI.
New story arcs coming soon (ARC IDs will be aded when I finish the arc):
So, you want to join the Hellions? (level 1-14 Villainous arc)
Sparks & Steel (level 5-20 Heroic arc)
and
So you want to join the Skulls? (level 1-14 Villainous arc)
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I was getting my butt handed to me by spawns of 3, even con, mutated, bunnies. BUNNIES!! I don't know what was more humiliating, that I was having trouble with even con spawns, or that I was being beaten down by bunny rabbits.
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If it makes you feel any better, I think Ninjitsu was bugged for a while. Wasn't it granting the mobs a large damage bonus?
Not that I disagree with you at all. There are some really broken combos out there.
"Mastermind Pets operate...differently, and aren't as easily fixed. Especially the Bruiser. I want to take him out behind the woodshed and pull an "old yeller" on him at times." - Castle
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I was getting my butt handed to me by spawns of 3, even con, mutated, bunnies. BUNNIES!! I don't know what was more humiliating, that I was having trouble with even con spawns, or that I was being beaten down by bunny rabbits.
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If it makes you feel any better, I think Ninjitsu was bugged for a while. Wasn't it granting the mobs a large damage bonus?
[/ QUOTE ]Yeah, Ninjutsu was making all attacks double damage, all the time for a while on Test.
Pairing two control sets together is murder, too, even for a melee AT if they're not careful. I ran into a group of 4 Plant/Earth lieutenants while testing one of my arcs once, and managed to get about 10 immobs and 5 or 6 holds stacked on me 
http://www.fimfiction.net/story/36641/My-Little-Exalt
Im new to the game, only been playing 6 mos, and i noticed alot of the enemies you battle do not fit into the archtypes available to players. They usually display powers available to seperate archtypes. I would like to see these choices available to players. It would be cool to make a toon that was a combo Brute/Dom or Scrapper/Blaster. Im sure with a little thinking/planning this would not unbalance game play and give players more choices. They could call these special classes Deviants because they deviate from the norm. The more options available to the players will interest more people in playing the game.