Decided to try my luck with buying it. I can't stand it. The basic gameplay feels like it doesn't control very well. The controls for getting a spell ready are weird and slow, you have to move the mouse in the direction of the three buffs you want and then wait for it to actually activate each one. Movement isn't great, and the camera has issues too. The game switches between first-person and third-person views very suddenly, and because they share the same FOV I end up having to play most of the game very zoomed-out in third-person to have a reasonable chance of not getting sick when I enter a house and it switches to first-person.
Speaking of houses, this game is constantly trying to stop you from playing it. I don't want to stop to search houses for loot, I don't want to then spend more time comparing a bunch of stats on the randomized gear, and I absolutely do not want to read whatever procedurally generated "story" the game offers between missions. If you avoid all of that, the game boils down to this: Progress through the map until an event allows you to actually play the game, run away from enemies while shooting your spells at them, go to the exit, and repeat. There's just nothing interesting or fun going on here for me.
For anyone thinking of getting this, my advice is to just forget about it. Even if it had been 75% off, it would feel like a waste of $5.
This was pretty much my impression from watching the trailers and seeing the screenshots on the GOG game page. I'm glad you took the time to write this post and actually warn possible customers (instead of the usual run-of-the-mill GOG Forum "advisory" post consisting of "this is an indie game and I hate indie games so don't buy it"). Like I said, I was never on the fence regarding Fictorum, because I found the trailers and the screenshots alone to be very self-explanatory of what I'd be getting by purchasing a game, but I'm happy that you took some time off to type this and *really* warn people about what they're getting if they buy the game.
Also, sorry that you had to go through a less than good experience in order to inform us of what we could expect from it.
I guess that if people want a game where they can mess around with -- and "craft" their own -- spells, they're better off sticking to Mages of Mystralia
(which also features a somewhat decent story by Forgotten Realms creator Ed Greenwood; and at least it seems to actually *deliver* said story, unlike Fictorum). Mystralia is a bit more expensive, sure, but I think I got my money's worth from it, whereas €20 (or whatever GOG is selling it for on your end) for Fictorum seems to be... a bit too much.
[EDIT] Word of advice: Mages of Mystralia does seem to have a somewhat more limited spell crafting system than Fictorum. That being said, it also seems way more fun and engaging to play. And, again, at least it has a story. A non "procedurally-generated" one at that.