Exactly right
@Papa Shango .
It appears that Frank has fallen into a trap in terms of formation and setup.
Yes we needed to upgrade the defence - Mina cannot stay fit and Keane is just abysmal, so a couple new CBs was an obvious and welcome move. Great.
Yes we also need to upgrade the midfield - Onana is a welcome addition but we still need more there. If he gets injured at any point then we are left with exactly the same options as last year (minus anyone we manage to sell or loan out).
Yes we desperately need an infusion of new faces in attack - even if Richarlison had stayed!
BUT what I think has happened is that for whatever reason we have managed to complete our upgrade of the defence completely but made very little progress elsewhere, so Frank has thought to himself "How can I minimise the damage in these first few games, while I wait for the board to get their act together?" and the answer he's settled on is "play more defenders, sit back, absorb the pressure and play for the draw."
The problem with this approach is that ANY team that sits back and just defends in the Prem will eventually concede a goal.
I actually think we'd be no worse off if we switched to a 433 and played a more balanced game because, as you say, we have upgraded our defence. I trust a back 4 of Patterson, Holgate, Tarkowski and Mykolenko WAY more than I trusted Coleman, Holgate, Keane, Mykolenko. So play them and stick Davies, Onana and Iwobi in a three-man midfield, give us a fighting chance in midfield instead of just conceding it from the start. Maybe the extra man in midfield would have got us a draw in one of those first two games, maybe he turns the Forest game into a win.