Why does thief ...
Thief, Engineer, Mesmer – Seafarer’s Rest (EU)
I agree to an extent, especially due to Initiative.
But “weapon specialist” is a niche that Warriors have occupied. It’s just one of those class-defining differences. 10 seconds swap-time is base-line, so it’s not like we’re being handed the short end of a stick.
I’m not sure if it would increase the skill-cap though. Short weapon-swap times make a class very forgiving. Switching weapons should be a brief commitment. When a Warrior switches to Longbow for example it’s barely enough time to capitalize on Whirling Axe before he switches back again.