I actually like the Charge Kick. It's helpful for getting through hazards, unscathed. You can even slide through enemies and some bosses.
And yes, Power Stone is the worst weapon ever. Even worst than the Top Spin.
And I do agree with you when you say that wackiness has been a staple in the Mega Man universe as early as Wood Man. If anything, he should be on the list for starting the trend. I think he deserves a spot more than Splash Woman anyways.
I'm not really bothered by the extravagant designs of some of the Robot Master designs either. Can't have all "cool" Robot Masters all the time. I personally like variety, may some ideas be "stupid" or whatever.