Second snares and simillar surfaces override other hazards meaning you can't make a new surfice that would have both effects of grease and web let say. That alone would improve it and it would fit the whole surface gameplay that Larian is known for.
Third surfaces will always get removed by blood from hits and that shouldn't happen they should combine not override. It's the same thing with acid and poison all those things should mix not override...leading to 1 turn use at best in most cases.
We know that engine lets you combine surfaces DoS 2 had healing fire .
The fire ignite mentioned can be a problem due to explosions with minimal damage though at least players can control it on their side somewhat using poison as dips and using other cantrips.
If we could combined those surfaces to make new ones instead of overriding everything this could be fixed as well. Example if you Wet Web or grease you get wet web or wet grease that woudn't explode from fire.
in the end i'll leave this here as well Thunderwave spell should snuff out fires like it does in Solasta how that one got pass Larian i don't know.
Lastman, I agree with your comments on the implementation of these spell presently. The insight into how Larian's systems have worked in the past is appreciated, as I only have a few hours experience in the DOS games. If they are determined to continue the surface madness, I do hope they do another pass over spells that involve them. I would prefer a wet web/grease to one that's not, as at least then one could get some 'D&D style' tactics from these spells. But with such a low duration you'd only have the combined surface for about a turn anyway, so still not too useful. I did notice the surface replacement you mentioned with regard to blood pools. Even a single sword swing can ruin half your area effect!
I did notice one thing I believe they added recently, Web can be used to remove fall damage if you jump onto it. Maybe they're still monkeying with the system? Putting out fires with Thunderwave would be cool.
