FrogReaver
The most respectful and polite poster ever
GWM works on long bows. That is something one should not neglect.
Yes, with 14 Dex, to hit is a bit worse. But dealing some damage at 150ft range is better than not dealing some damage at 150ft range.
Especially nice with trip attack.
I am torn with PAM. And I can see either a ranger or an eldritch knight* with shillelagh using quarterstaff and polearm master without GWM.
*monks benefit from PAM too. The reaction attack works. Sometimes attacking with the staff instead of an unarmed strike might also be benefical. There also is the question if you use monk unarmed damage for the offhand strike (probably not, but I'd probably allow it), so you can benefit from magic properties or even a mastery if you learnt one with the BA attack. It is debatable if it is worth it though.
Overall I am really unsure about the new possibilities. I don't have enough experience woth 2024 characters to actually say what works in actual play and what not. And until we see the new monsters, I guess everything is a bit speculative.
Shileleagh is probably better for warlocks. Gives you a melee/range charisma attacking combo. EB for range shileleagh for melee. Open with eb. When they finally get to you shilelagh and melee the enemy.
Limiting your ranged options as melee can be rough. Maybe on a Paladin with command and some other ranged cantrip.