First you're arguing it's not a big change, now you're saying even if it is a big change it's not a big deal. Let's stick to one argument at a time otherwise this is going to get chaotic. Do you now agree that it is a big change?
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.