Cryomancer
Arcane
I doubt there will be cool down on spells or abilities. At most, if short rest aren't there, then maybe some skills or spells may have out of combat cool downs to compensate or as someone has said, probably limited uses per combat. Perhaps Larian wanted to avoid the players spamming short rest too much after every fight, which would be a stark contrast to D:OS 2 auto heal and easy rest. Also maybe they were worried that it would somehow affect the "flow" of the game if players rested after each fight.
Is there any info about how long rests are going to work? I really hope they do not let us just rest without consequences, it would defy the purpose of the mechanic if it were like that. Either limiting when to rest or some kind of time limit should help to encourage the players to manage their resources instead of relaying on resting.
Yes. Was me.
For short rest, IMO limit 3 short rests per long rest and GG. But classes like WLK needs short rest to be viable. Unless you wanna half of wizard power and then a endless eldritch blast spam...