It is difficult to say a 'Yes' or a 'No' looking at Rahul's performance as a first time MP in and out of Parliament.
Rahul was a crowd puller, no doubt, thanks to his resembling his deceased father Rajiv Gandhi. But it ends there. Complaints that he is not as spontaneous as his sister are genuine. A carefully worded speech and a similar statement, almost read out of a note there does not make a person. As far as the machinations of realpolitik of UP is concerned, he would probably find it difficult not to get carried away by the power brokers in the UP congress.
If he really wants to do some thing to revive the Congress in UP, he should for some time work at the grass roots level in UP. The best thing he could do is to build a team of youngsters about his age, utilize the opportunity of the Rai Bareili Byelection as the start up and tour the state's length and breadth, reach out to the Univeristies, colleges and institutions where youth are craving for something fresh, and villages. People of UP would then prefer Rahul for their Chief Minister, and bring the Congress back. His return to the national politics would only be a logical conclusion.