This is addressed by the fact that you can rest freely in BG3.
Which is another problem and make the whole point of short rest to regain WLK power pointless.
Lowering the goblins hp would make the fights a little too easy in my opinion. Let the gobbos keep their hp buff. I prefer to not have my enemies killable in one hit.
Put more enemies or tougher enemies.
Also, 5e already is the second lowest lethality D&D edition, losing only to 4e.
On 2e, is not impossible to end multiple enemies in a single round.
[I'm arguing it's not a big change. Goblins having higher (10-15) HP doesn't make fights take longer IF chances to hit are appropriately lowered. This is where Larian has failed: they reduced AC but not Saving Throws, and they didn't properly buff Sleep.
Goblin elites (those with >15 HP) are just that, elites, and its fine for them to have more health.
No, it does. For casters. A single magic missle can end a goblin on 5e but not on BG3.
A Eldritch Blast on 5e at lv 1 can OHK a goblin. On BG3:EA at lv cap can't.
And note that 5e already nerfed the spells to oblivion.
Goblins on BG3 are close to 4e goblins than to 5e goblins.