As Navagon and others have noted, the whole idea behind this "Revival" seems pretty pointless. Even though Vampire never looked particularly stunning or polished from a graphical standpoint it has never been in desperate need of an upgraded engine per se; just a better, less buggy implementation of the one it already has (the original Source worked just fine for Half-Life 2's initial release, for example). This is where the unofficial patches come in, and that project has been producing actual results for a very long time now. Moving to a "new" engine seems like it would only multiply the difficulties tenfold by basically requiring changes to take place on an even more foundational, structural level than the unofficial patches.
I thought I'd never say "if it ain't broke, don't fix it" about Bloodlines but with Revival having this particular focus there isn't much else that one can say...

completed the game with official one and latest (a year ago) community patch and didn't really notice any bugs worth remembering
load times were horrible tough.
with community patch the game is no more bugged than any other game out there.

Eugh, i really want to play Bloodlines but I can't find anywhere to buy it for a decent price.
I can has GOG release? I mean, we've had newer games than from 2004

play.com sells it for a tenner.

I think I got my Steam copy for $5 in one of Valve's numerous sales. A GoG copy without DRM would be better though.
I'm sure I ran Bloodlines with the Source DLLs from Half-Life 2 at one point, but from what I remember it broke as much as it fixed.