I dunno, voice acting is often a bit of a gamble: even within the Divinity series, in DD it wasn't great, in BD it was worse, in D2 it was excellent, in D:OS it was pretty good and in the EE not quite so good. It really makes games like the Mass Effect series, in FO4 it was great and it made Skyrim feel dull and charmless (well, to me, at least).
And without voice acting, Two Worlds would have perhaps been less memorable! Actually the voice acting in TW2 was certainly more professional, but it was also much more forgettable.
From my perspective, I tentatively hope it'll eventually be voiced; but there's always a risk I might hate it.
