I am really not in favour of more DOS-like surfaces entering BG3. There was a long fight to get cantrips like firebolt/chromatic orb changed so they don't leave surfaces (not sure that some still dont). The proliferation of cheap options to create surfaces, even at low levels, is already making the game less enjoyable, for me at least. And even having to make 1 concentration check, rather than 0, could be deadly in the wrong circumstances - you may now lose the only spell keeping you safe, vs not having had that chance e.g. you are almost dead, invisble and trying to sneak out of a room...but now there's a burning/freezing floor to worry about. In 5E damage dealing/effects are carefully balanced - each change has consequences, some of which can only be seen much further down the line. Sleet storm already provides a chance of falling prone - but it is 3rd level spell and the effect makes sense, the icy patch is created by the spell itself, and this makes it dangerous for non-dextrous characters. The ease with which BG3 allows surfaces to be created - that accomplish nearly the same thing with a cantrip - greatly undermines a spell like sleet storm.
