It's not like quality of "finished" games released by publishers is any better. At least with early access tag they can't sell you gazillion DLCs for small fortune. Watchdogs is "properly" made and released game yet it is buggy as hell, half of stuff isn't working as advertised, some design choices are just poor and they already ask more than for the all stuff they are selling.
Early access kinda suck atm, but it's not worse than traditional publishing model in any way. Maybe those unfinished projects might turn open-source in the future, that would be a good thing. That never happens with publishers.
Example: Infamous and unfinished project, DayZ is more fun and less broken than Watchcrap and any other crap released on PC by Ubisoft.