This year has been super nice in Japan so far. The hottest it's been is about 20 deg and never humid. Of course it'll get as miserable as always in the next few months but for the moment I'm loving this.
Also, any United fan who would turn away Tiote or Fellaini is a bit crazy to me. You have a point regarding Fellaini's thuggish behavior (Salazar), but you're probably underrating Tiote's passing ability. He'd work well along with Carrick and Kagawa - you'd have a really balanced trio there, where with Modrić, you'd be looking more at a replacement for Carrick than a partner, IMO.
Injuries notwithstanding, I'm pretty sure Cleverley will be starting alongside Carrick for most of the games next season. But Carrick is the wrong side of 30, and the only deep-lying United midfielder who can screen the defence. If he gets a major injury, our midfield depth starts to look shaky. I don't think signing an alternative would be a bad move, at all, especially with Pogba, our budding regista, out the door to Juve.
On the other hand, it's hard to stay optimistic about Fletcher's condition, after the Hargreaves saga (who we never really replaced, either). So, a box-to-box midfielder, for the occasions when we need steel in the middle, wouldn't hurt either. We should definitely have that option. In fact, I think it's a requirement if we go back to playing counter-attacking football properly, with the 4-3-3; no more of these predictable Serie A circa early 1990s tactics, hopefully. My (pipe) dream would be to get Sahin and Javi Martinez/M'Vila, but undoubtedly Fergie will just sign one less-fanciful midfielder; maybe a versatile figure like Juve-bound Asamoah, so as to give Fletcher (and, ugh, Anderson) a chance to recover.