The squad -
https://www.uefa.com/uefaeuropaleague/clubs/1652--tottenham/squad/
Here's the 23 - Venom, Forster, Austin, Whiteman, Dragusin, Udogie, Romero, Porro, Davies, VDV, Son, Bissouma, Madds, Gray, Bergval, Kuklusevski, Johnson, Odobert, Sarr, Bentancur, Richi, Werner, Solanke
Club trained - Whiteman, Austin (hence only getting 23 slots)
Association trained - Forster, Madds, Johnson, Solanke (you can only name 4)
B-list - Gunter, Dorrington, Cassanova, Moore, Hall, Olusesi, Lankshear, Ajayi, W-Barnett
Couldn't name - Spence, Reggie
It's still a decent 32 man squad for the Europa League. Pretty raw for the CL though.
Next season:
1) We'll have Keeley, Austin, Devine and Scarlett as club trained choices. Technically, Max Robson and Matthew Craig as well if they are still around as they are all 21 or over.
2) We'll have Spence, Solanke, Johnson and Madds as association trained. If we keep Davies, one of them will need take one of the 17 other slots as you can only have 4.
3) Bergval, Gray, Odobert, Yang and Vuskovic will have to take some of the 17 slots because they haven't completed 2 years at the club and can't be on the B-list. Ditto any new purchased U21s.
4) The B list will have Phillips on it because has completed 2 seasons with us and is still U21. The 9 above still apply as will many others in the academy.
I can't see a scenario where we won't be back to 25 slots though. I can see a scenario where we might loan some of the 2nd year purchased players to free up more overseas slots and match with the PL configuration. When all those U21s complete 2 years at the club in 26/27, we'll have loads of slots.
Doesn't answer you question about whether we'd be better off with a KWP, Edwards or Cirkin rather than the 4 club trained named above. As it goes, I wouldn't. Devine or Scarlett might become Spurs greats. In my opinion, KWP and Edwards never will. I'm not sure about Cirkin though.