User experience is that the complexity of defining profiles in a two separate tools. The problem is that on UML level a profile is not visible and UML, which is extremely usefull in documentation. It would be good to have an integrated approach that supports the requirement to deal with profiles in UML as well.
I forwand this from Methodology to Tool, since it does not effect the clauses in Methodology but only the way they are implemented in the tool. Would also have impact on documentation.