Maybe, just maybe they can Re-Adjust the power bonus given per-skill base on how useful it is or for its popularity.
Like Nightingale for example:
1st Skill: +50 power per level
2nd Skill: +2 power per Level
3rd Skill: +3 power per level
(of-course these values are just examples. No need to be triggered. But are they? hmmm)
But this is just ONE of the possible fixes I can think of.
NOTE: this is not a complain but an idea. Because some people just don’t understand the difference. EXAMPLE OF COMPLAIN: Why do I always get matched with strong people!!?.