No. You want the rulers that are good at what you choose, become republic.
The point of playing Monarchy, exactly is the fact that you on`t choose you ruller`s son/daughter abilities and have to be flexible and change your priorities, while Republic allows you to have stable goverment focused on one thing for centuries.
I agree insofar that you shouldn't be able to 'choose' what your heir is good in. However, I think small nudges in a certain direction could make for interesting gameplay.