Players who are clearly good enough to compete for trophies with:
De Gea, Smalling, Schneiderlin (controversial), Martial, Shaw
Players who at some points in their career here or elsewhere were at a level good enough:
Darmian, Schweinsteiger, Herrera, Depay, Rojo, Mata, Young, Blind
So basically we have 5 players who are good enough, 8 players who could be good enough, then some players I'm not sure about (Lingard, Januzaj, Carrick) and some who might not be good enough (Jones, Rooney, Fellaini, Valencia). It's not a terrible squad and it's something to build on but we need to get the best out of more than 2-3 players which is the best we've done in the past 3 years plus we need some attacking talent.
Depends on our ambition obviously. If we want to win CL then it's not good enough. If we want to be around top 4 in the league, it's easily good enough.