Random thoughts:
Raul looks good enough for this level, certainly. Very unfortunate with hitting the post in the 1st half and then getting shunted around to accommodate Leo in the 2nd. His movement and energy are very, very good and it bodes well. I think in another few weeks once he's used to playing with the rest of the team (and vice versa) we'll really start to see something good out of him.
I'm a Leo supporter but he was pretty poor today - there's a clear dropoff in quality between himself and Raul. If Cav was fit I don't think he'd be seeing the pitch right now, honestly. Hopefully he can bag one in one of the cup games and start to get his mojo back.
MGW also had a couple of very heavy first touches that killed moves, including one where he was in on goal. Something for the lad to work in but he certainly doesn't look overawed or out of place in the team.
Traore was positive in fits and starts but I did wonder if he started on the left as Nuno wanted to repeat Pulis' trick of keeping him near so he could feed him instructions. He produced a few good deliveries (and mishit a couple others) but overall positive. If we weren't playing against a team sitting back he should have real scope to get in behind, hopefully.
Costa and Jota both started pretty brightly I thought, they both got in behind and made the Leicester defenders look a bit foolish, but it seemed they drifted out of the game, particularly after the 1st went in. Again, if Cav were fit I think we'd be seeing some harsh treatment from Nuno as neither has really hit top speed yet but at least one will have another chance next week.
Jonny again I thought was really good, albeit 2nd half offensively he basically offered very little - not sure how much of that was down to Traore shifting to the right and him having very little offensive support on that side - he's not someone who's going to beat a man, basically. Defensively very solid though, perfect example being tracking the run late in the 2nd half to prevent a 1-on-1 (can't remember who it was, Ndidi maybe?)
Not much complaints about the back 3/keeper other than Coady maybe could've closed down a bit quicker for the 2nd. Boly was much better (albeit still a bit loose once or twice) and Bennett was very solid, one or two brainfarts in possession aside.
Neves/Moutinho is a quality axis and I don't think we should have too many concerns about them. They won the ball back a number of times and distribution was generally very good, Moutinho desperately unlucky with the effort that hit the bar.
It isn't quite daylight robbery but Leicester were very fortunate to win that. We probably should've been at least 1 up before they scored, but as we've seen before this league is very unforgiving. I still think we'll be fine.
-edit- re Vinagre I can only think (hope) that he didn't really have a full break/preseason after being away with Portugal, so as with Dendoncker he should be up to speed in a couple weeks.