I actually liked the idea behind plug ins and their way to expand RPing while giving you more tools to RP with. Hopefully the DLCs are like that as well. Geared towards expanding certain RPS etc.
Have to agree with this. Extra factions are always good. Bards, necromancers, pirates, whatever, a fully fledged questline, and a guild headquarters, maybe a new player home thrown in, that is worth the price of admission; a player home with no quest, or let's face it a joke quest, much less so.
As far as size for extra content, KotN and Unearthing were kind of ok, but if you are adding new lands, if SI is too ambitious, then Point Lookout sounds pretty acceptable. Wouldn't see me complaining.