I wish I knew the answer. I am not sure Jose or Giggs is the answer.
I think that on each of the last two summer transfer windows, I was happy with the players that got purchased and let go. Something I couldn't say many times in Fergies era. However, I thought Veron would be an absolute star for us, so what do I know. Saying all that I have been surprised at the weak mentality of these new players. Easy to blame the manager, but I think a lot of our problems are the players.
For managers, pretty sure no one would have chosen Poch' before seeing what he did at Southampton or Spurs, so there are good managers out there that are not at the big clubs. Jose does not have much choice, he has been at most big clubs, he is unlikely to interest Barca, won't get to Bayern, so who is he really going to go to. I would support him if he came, but would certainly not listen to his post-match PC.
I think this summer is going to be very interesting, it is LVG's last season, so if someone really is available then I think you would have to consider a change. Personally, I wouldn't change a manager that wins the FA, Europa, and gets in the top 4