Hm. There appears to be a bit of a disconnect here on interpretation of what the various parts of a DFRPG character mean.
Powers are (with the exception of Refinement & possibly upgrades of Channeling to Evocation or Rituals to Thaumaturgy) representative of What You Are. For example, a plain, ordinary, werewolf costs 6 refresh (7 if part of a pack); an inexperienced werewolf could represent that with lower skills and/or a trouble aspect, but simply can't exist if you lower the available fate points.
A very fresh werewolf could, in fact, lower it's refresh cost by by skipping some portions of it's power set. Yes, the wereform grants Inhuman Speed, but when none of your training or reflexes take that into account, it's more of a liability than an advantage. Nearly every creature type gets better at what they are with time and experience. (Also, once you're up to 10 refresh, you're buying a lot of things like Refinement and higher level versions of your powers.)
If anything, I'd expect lower skills to increase the value of fate points and mortal stunts; when your best skills are +3 and +4, an extra +2 from a stunt or aspect invocation is a notable contribution.
My character is designed to lean primarily on his skills. When I can only have a +3 or +4 in a narrow field, I think I'd be outstripped in many situations by someone with powers. Many powers give bonuses as well as letting you do more things: Claws give Weapons, Recovery gives consequences, and wizards get Focus Items.
Also, I absolutely don't buy that the game system is fragile enough that there will be balance issues caused by lower skill w/ higher powers
I don't think it will break the system, but I think there was much thought put into to the current balance. Since I have yet to use the RAW, I'd rather not alter that balance. (And there are some notes about how frequently different types of advancement should be given...) Also, I think that if we're playing more powerful characters, we should be allowed to use the skills to back it up.
I will move my vote down the chart a little bit, but put it on record that the more detailed version of my desires is: "6-8, but if we're going to do 10 let's just do it all out."