I appreciate that this is attempting to bring balance and there are truthful points in there, but misses a few crucial aspects:
a) The board said the first team squad was too small previously. It's now 1 lighter. That's not just a failure, it's an embarrassment to them.
b) the players who you said were peripheral were so because broadly Moutinho, Dendoncker and Neves remained fit. There's no guarantee of that happening again, I'd say it's unlikely and the former looked knackered at points last year, but is expected to carry a similar workload as first choice whilst a year older. We've lost those alternative options.
c) The manager has said he wanted 3/4 extra players continually over the last couple of weeks. He got 1 and a net 0.
d) Based on his history and the way he started the first couple of friendlies it's a reasonable assumption he wants to play 4 at the back. Unless he thinks that is Boly/Mosquera +1 the he can't do that, so you are compromising the way he wants to play. Essentially adding a centre half for a forward/10. I'm sure he'll fudge what he can with what he has, but after making such a bold change in philosophy you aren't empowering the guy to completely do what you brought him in to.