We have strong wing backs but we don't essentially have a CM at RB who will get guarantee double figures for xA. That's what Liverpool had with this system and how they got away with a very functional midfield. 12, 12 and 13 assists from Trent in the seasons they challenged. 11, 12 & 10 from Robertson. I think to expect this from Porro & Udogie would be a lot, and you'd be better off having at least one creative minded midfielder to help with the burden.
Poch had Eriksen - 13, 15, 10 & 12 assists at his best. Who out of Skipp, Bentancur and Hojbjerg/Bissouma do you think takes on this burden? We had Walker & Rose AND a designated more creative mid. This is why we need to go out and sign a Maddison (or someone of this type) so we have someone who we can rely on for creativity. There's not enough of them in this team.
The way we were playing 2nd half of last season wasn't sustainable. I said this at the time and have been vindicated I feel.
We don't need 10 in or ten out. We need 5 players in imo (gk, lcb, creative midfielder, ccb, wide player) to start looking a team consistently. Obviously that comes with the caveat of those players need to actually work out, so we need 5 successful signings. In an ideal world more than one wide player, but 5 is the minimum imo.