I actually think it is more of a fundamental overhaul of his tactical set up. If it were the case of a few tweaks, we would have seen evidence of this evolution already with our existing players, but if anything it has got worse. I also envisage the squad taking a long while to gel into something cohesive as there is a significant overhaul taking place (Jorginho, Zinchenko and maybe Jesus and Partey leaving, Odegaard and Martinelli off form and Havertz not truly settling in midfield despite his relative successes upfront).
I would like a couple of dynamic, athletic (and fast) and somewhat unpredictable, attackers brought into the squad, alongside an attacking RB. I feel so much of our consistency fell off when Ben White got injured and our threat down our RHS evaporated. Timber has not been a good replacement in that sense for me despite his technical ability.