It's the same logical sense of having a left footed CB like Lisandro. The technical ability on the ball has increased significantly with the addtions of Lisandro, Eriksen, Casemiro, and now Antony. With Sancho on the left, Antony on the right, and even Martial/Ronaldo combo through the middle (for now), the balance of the team is so much better like you mentioned
The squad building will not be fully realized for another year or two, with probably a new CF, another CM, GK not named David, a RB, and possibly a new CB. But the team is improving day by day on a basic, yet extremely important level.
Very early, but at this point I'm guessing the plan for next season is like this:
-------------------------------
Striker--------------------------- (Martial)
-Sancho------------------Bruno------------------Antony (Rashford, Garnacho, Elanga, Eriksen)
------------------------------------
#8------------------ (Eriksen)
---------------------Casemiro-----------
RB----------------- (McTominay, Dalot)
Malacia------Martinez-----Varane------------------ (LB/Alvaro, CB, Lindelof)
---------------------------------
GK------------------------------ (Dubravka)
with Cristiano, De Gea, Shaw, Maguire, VDB, Amad, Pellistri and Fred (will want to start somewhere) all leaving.
Tons of wages off the books and we go hard again for Timber or James Justin or another RB comfortable inside helping in midfield, a giant money striker, a cheap LB, Maguire replacement, starting GK who can pass it, and a proper #8. Eriksen gets lots of games as our 2nd choice #8 and #10 and is preferred to Bruno in some games.
Balance looks good. Casemiro helps out the small defenders on his side, the RB and Malacia play in midfield a ton with our wingers on the touchline and lots of space for Bruno work in.