Just limit the skills as it is with science, that more than 200% won't help you very much (or will give you LESSER chance per % than now) so having 200% and 300% skill will be just a wish of a "nerd player" who wants to have all on max efficent, having 300% of skill shouldn't have been rewarded more than level up in this way it is now.
Eventually making skills limits depending on intelligence is good way to balance but I wish other skills don't have THAT big difference like it is with sneak - between having 200% and 300% it's huge diference, and I wish it to be smaller, so we won't look at that being so "minimaxing skills".