We created enough chances for 4 goals today, it was just one of those days where not everything comes off. Of course, the right wing situation does need sorting out, and Mata really isn't good enough anymore IMO. Neither is Lukaku or Sanchez. But as depth they're fine, just I doubt the latter 2 are okay with that.
Even with Ronaldo, Tevez, Rooney, Giggs, Scholes and Carrick with Evra at full back under Fergie we had bad games or games where we struggled to break down the opposition. No need to go overboard and say massive changes are needed. 1 center back, a right winger, a right back and our first 11 would be pretty set along with the depth being much stronger because of 3 current starters dropping down.