The Definitive Edition is on sale at 60% off yet the individual DLC's are only 30% off.

So people who've purchased, like myself, all DLC except "Grim Dawn - Forgotten Gods" are destined to forgo playing the new expansion or pay the higher price as we did with the last couple of DLC.

I'm never sure if these inconsistencies are GOG or the Developers but I can honestly say they erode my trust in both.

My guess is it's because of the way GOG's Definitive Edition is done. Looks like it's all or nothing here while on Steam it's if you already have the base game you can then use the DE to get the expansions a bit cheaper whether on sale or not. It's not a buy all package there.

Seems you're correct.

The Definitive Ed has come on special again at 60% off while the 1 DLC and 2 Loyalist packs I'm after are again 30%/25%/25%.

I'm only really interested to support the Dev's as I doubt I'll play the game again any time soon, guess I might leave them on my wishlist and try again in the future.