No. Too much work for the gain. It's not that hard to get 100% in some skills, especially with unique item bonuses.
Then perhaps only make the option available for certain skills? Take spell casting for example. I don't know how easy scrolls are to come by, but in my experience they are not and in 5 years of play I've cast very few. I've never even met anyone who had 100. Swordsmanship is a bit different, I've met characters who have hit it, but only 2 or 3. Not sure about the other skills, but I think the potential gain in terms of gameplay should not be underestimated.
One of the coolest things about this game is how almost everything is player generated. 'Almost.' I see this as a contribution toward that end.
