That’s again blaming the current balance of 5e balance...
Martial ranged left in the dust? Have you ever heard of sharpshooter? 10 out 10 consider this feat the strongest in the game. Way more high rated than GWM
I think you confuse between Sharpshooter being undeniably great feat and the total end result. Sharpshooter is great, but despite that ranged builds are universally outclassed by melee builds in 5e. And specifically GWM/PoM melee builds at that.
Other than that - we have yet to see if Sharpshooter survives as is in 5e in BG3. For all we know they can amend it to take advantage into account, but even if not - you will still get biggest cheesiest DPR with heavy melee builds, especially with added bonus of AoE attack they got.
