A really good January window is 2 signings similar to last Jan, and we might get there again with Porro and possible Zaniolo.
If those were to arrive then you have Porro, Romeo, Udogie, Sarr, Bentancur, Kulu, Zaniolo, Richie who are new and young enough to form the basis of a new team (formation and manager TBC).
Add to them 3-4 arrivals in the summer, mainly at CB and GK, plus the likes of Skipp, Spence (possibly the Brighton-Bisouma) and the twylight years of Kane and Son if we decide to keep them, and the squad starts to look quite refreshed
We have a lot to shift out though: NDombelo, Reguilon, GLC, Sanchez, Dier, Sessegnon, Tanganga, PEH, Moura, Royal, Doherty etc etc