I finished Divinity: Original Sin!
It does what it says on the tin, there was divinity, there was a cod-Edenic narrative, and it was played in a way I didn't hate, which is actually very good going given how I generally feel about the overly apocalyptic nature of a lot of fantasy RPGs. I think the big thing with D:OS is that it is very much turning both the epic and fairytale bits of fantasy up to eleven: it's very pulpy and it's not trying to keep too straight a face about what it's doing. The fairytale bit is interesting too, it's a very "you can chat to all the animals and rescue a wishing well from fairyland" level of fantastic, which other games mostly don't quite jump into with both feet in the same way. So I appreciated that.
My player characters were alright. The game gives you a duo, mine were Mnemikre, a cautious but easy-going geomancer/crossbowman/hydrosophist who was the party's healer, secondary archer, and summoner as a fairly general all-rounder, and the rather sharper (both in wit and outlook) pure intelligence focused damage mage, Sarasande, who focused on witchcraft, aerotheurgy, and pyromancy. I'd suggest to anyone else trying to do a first run that this was a bad combination, and given the limited four-option companion range and their abilities I'd make one PC a true tank. This is especially important given that the rule for "game over" and having to reload last save is when both your PCs are downed, even if your companions are still tootling along quite happily.
The core game loop is good too. The different systems are generally well signalled, it's obvious what does what and the main gameplay being about elemental damages and resistances with various abilities to hit in with those and a set of basic status effects which have mostly-logical outcomes. I had a few annoyances like where enemies' idle animations would suddenly drop them out of the cursor at the last second leading me to walk a character somewhere I really didn't want them, but that didn't happen often, by and large the gameplay was fun. Charm is an immensely powerful spell given how the balance works, because you're rarely fighting swarm enemies: it's rare that there are many more than six or so enemies at a time except in a few boss battles, and often fewer, but they're relatively powerful, so generally the core tactics involved finding ways to "tie up" some enemies with charm, lightning stuns and summons (I never really had a true shield-tank in the party) whilst my archer and two-handed warrior, both companion characters, hacked away and dealt damage.
There are some downsides. I'd have enjoyed a more streamlined system for several bits, most obviously looting where there were sometimes tens of containers to check through per room which given I am a very impulsive check-every-container person is a good way to leave me stuck in actual hell. Also there's no obvious way of searching for particular item bonuses, so when you need to e.g. boost Loremaster working out how to do that is hard. Some skills are also much easier to boost than others, which isn't obvious at the start: so e.g. you never need Loremaster above 3 because getting a couple of +1 items for it is super easy and the hardest check is a 5. But skill-based abilities like, say, Geomancy you kind of want to pump up to five fairly efficiently and there's no equipment (at least none I found) that boosts those.
I also think the game was about 10-20 hours too long in my 83hr playthrough, and I didn't get round all of it and never got to doing lots of the crafting etc that I was kind of interested in playing with. The crafting part really needed a shared inventory pool accessible in lots of places in the Homestead including e.g. next to the forge. The other thing was the number of areas that could have been reduced in size quite significantly, or just been given less ambient damage effects, most of which made no tactical difference, just slowed you down while you waited around casting regeneration spells repeatedly. The run of goblin fights up to the mine entrance was one example - but a lot of areas in general could have done with one or two fewer combats.
Nonetheless, overall I think D:OS is very solid. I think it's at the better end of my pool of mid-range RPGs, I'm relatively unlikely to play it again but I think mechanically it's good fun (definitely beats out e.g. the Pillars games) and it has a gonzo charm which I think makes it stand out a bit as something that's a step pulpier and funnier than the standard RPG setting, which I enjoy.