Our attacking depth (Assuming Sanchez signs)

Striker options
Lukaku
Sanchez
Zlatan
Rashford
Martial

Wide options
Sanchez
Martial
Rashford
Mata
Miki
Lingaard
Young
Valencia

No10 options
Lingaard
Mata
Miki
Zlatan
Pogba

Yeah I think we have plenty of depth in the squad

Possibly another no10 and winger in the summer as I suspect at least 2 (probably 3) of zlatan, miki and Mata will be gone in the summer if not before
 
You can't put both Sanchez and Mkhi in that list. Once Sanchez is in then Mkhi is out. Bit of a bad assessment.
 
Jose talked in the post match about 3 attacking spots in the team today, so that clears up that he's trying to use Lingard as a #8 now and commit to Pogba in the free role.

I get the feeling Sanchez signing will be the end of our attacking additions until summer 2019, but I think we are one more top quality option short.
 
I think that Zlatan will be gone, if not before then most definitely in the summer, I genuinely see no reason to keep him once we have Sanchez, he's keeping younger talent out of the team and apart from maybe being a great role model behind the scenes I fail to see what he would offer on the pitch that we won't already get from Lukaku and Sanchez, just free up the wages and the team spot.

I also think Mata will be on the way out, one last pay day perhaps, that and I think he will be surplus to requirements soon.

So that leaves;

Lukaku
Sanchez
Rashford
Martial
Lingard

There are still question marks over Rashford and Lingard for me but they need to play otherwise they won't develop, but i'd say buy another attacker that can play across all the front positions, someone like Pulisic, and we'll be golden.

As for midfield, i'd say after Carrick retires and with the possibility of Fellaini leaving, i'd bring back Pereira into the fold and of course purchase another midfielder, possibly 2, we know Mourinho prefers to play 2 midfielders, he's shown it throughout most of his career, although i'm sure we'd all prefer to see 4-3-3
 
For all these obviously positions can change a bit...
352:
Lukaku/Rashford Sanchez/Martial
Lingard/Mata​
433:
Martial Lukaku Sanchez
Or
Lingard Rashford Mata​
4231:
Lukaku
Martial/Rashford Sanchez Mata/lingard​

Assuming we can get everyone in relatively good form, it's fine depth wise. All pretty versatile so can play either wing or as the 10. Main striker we have Sanchez who is world class, Lukaku who is very good, martial potentially world class and rashford who has huge potential too.