If you mean that philosophers should find answers to philosophical questions, thus (in theory) ultimately leading to no more need for philosophical speculation, in terms of what would be best, I agree. However, teaching things of a philosophical nature would still be necessary even in such an ideal world in order to improve thought.

If you mean that philosophy should ultimately be transformed into other fields, I will say that in some areas I'm not sure but there are areas where this isn't really possible- making the refutation of the skeptic a non-philosophical question, for example, is impossible. Another example would be ethics in a prescriptivist sense, or the problem of personal identity. There are ways of solving these, but there is no way to make them non-philosophical.