As it stands now Jimmy is a one trick pony, if he returns to the game to do something more then that status can change. He hasn't put in the shift I think he could have led that Donegal squad to another 2 or 3 AI finals.
There was a short window with that Donegal team though. I think a lot of those lads were done after 2014. Big players for Donegal like McFadden, Lacey, Kavanagh, Toye, E McGee, Gallagher were all the wrong side of 30 and Donegal under McGuinness had very, very little in terms of quality in depth. McGuinness got that job too late really. If he had taken that Donegal team on 3 or 4 years earlier then they certainly had 2 or 3 All Irelands in them.
Rory Gallagher really got handed a poisoned chalice when he took on that job, the transition phase where all those men were coming to their natural conclusion and youngsters who needed a few more years to show their worth.