I haven't really been following what all the fuzz is with Steam Early Access.
Seems to me every gamer should be pro the system.
There are a couple reasons why gamers may not be keen on Early Access. These reasons might not apply specifically to Larian Studios. The big issue is that customers are paying full price for a product to be finished later, and so they are relying on the company to be ethical and live up to its promises, and if the company does not, they have no recourse to get the money back.
I'm sure everyone here trusts Larian to live up to its promises, but not every company is so worthy. I certainly would not consider buying any Early Access game on Steam, EVER, for that reason.
Jim Sterling did an episode on Early Access just today.