A short rest should just heal your team to 100%.
This would make it really make sense to click this button instead of using the long rest.
The current amount of healing is sadly low.
With hit dices the players could choose to be fully healed or not. A button to be 100% healed without any other mechanic would not make sense AT ALL...
Why not? The arguments like "it's not how RAW works" is useless. If you might as well use a long rest to heal your hp then why waste time and use a short rest.
Changing the short rest would make it a profitable button, it is not always worth wasting time on a long rest, especially if you do not need to replenish resources apart from hp.