For the sake of some sincere discussion:
1) I think they have a potentially very strong starting 11. They have some really pacy and skillful attacking players, and most of them have a mean shot on them. They've got legs and creativity in midfield, and on paper at least a respectful back line. Whatever their team lacks in relevant skill they make up for in size, thanks to Mourinho.
2) They've got the size to bully some teams even if they're lacking cohesion, and also the right personnel to rip teams on the counter.
3) They get a lot of penalties. Either you can praise them for playing a way that consistently gets them in the opposition area with their pacy and skillful attackers 1-on-1 with defenders or you call out PGMOL. Either way, they get a lot of penalties, and that's good for them.
4) They have no squad depth outside of GK and DM. None. Dan James doesn't count. Unlike Liverpool they probably are going to take domestic cups somewhat seriously and unlike Liverpool it's unlikely they have the magic protein juice that allows their first XI to stay fit and uninjured for an entire season. They showed in the Europa League how bad being short of 100% fitness can affect them.
5) Is Solskjaer actually good enough to get them to where they need to be? They have a pattern under him of going on long runs of good games only to follow it up with long runs of mediocrity. Is he either the coach or the manager to turn things round when they go awry at the first time of asking? Sometimes they play the most insipid football under him and he can't change it.
6) They are really gambling if they don't make a few signings. Chelsea look determined to move forwards and both Arsenal and Tottenham look in much better places than they were last winter with competent managers too.