Hello,
For consumables that are instant use such as some heals with no over time effect, they can be used at full health. It can be frustrating sometimes when you accidentally hit the button since not only it is wasted but also on cooldown.
Another issue is when the duration of the cooldown is under 1 second such as 0.3 seconds left before being able to consume again. The UI clearly says you must wait 0 seconds before using the consumable again which feels very weird from a player perspective.
Other note, when an enemy is jumping I cant roll under them due to the hitbox being on the ground, feels weird.
Thank you
Fat