The one thing Mourinho has done in the close season is not let many players go. He will know there are players there who are not good enough long term but with with new signings (2 with vast prem league experience) he clearly wanted the side to be as familiar with the league and each other as possible for this season, particularly the early part. It is that for me which will serve them well in the first 3 months and not conceding goals
Will also help long term.
I think Pardew had it right on Saturday with his comment that he sees them slightly ahead of us at the moment. We have made wholesale changes and it will take time for these to bed in. Over 38 matches though this move by Mourinho will be evened out.
So far Arsenal look a shambles, Spurs are going to suffer at Wembley and Everton won't be close to the top 6 sides this season.
Liverpool look exciting to watch and if they sell Coutinho and buy a defender they may be more solid. We look exciting, full of effort but not quite the finished article. Sanchez would help no end. Chelsea suddenly look good again. He is clearly a good manager.
If I had to bet on top 4 it would be those clubs. Not sure what order yet.