Extra effects ans surfaces are cool.
Cantrips however, should be cantrips.
Automatically leaving areas causes way too much hazard and guaranteed damage or proning of the target. That's more powerful than a level 2 spell.
I think they could affect stuff if thrown at such stuff, like water or oil pools, but not do that and cause damage to the target.
I like the chill, acid, burning and other effects though, but the cantrips that cause them should deal less damage to balance things out.
