If they disable short rests on Tactician then they totally gimp Warlocks , Monks and Bards.
Warlocks specifically will only have 2 spells a day and then have to long rest. Not a good design and makes them many times weaker than Sorcs and Wizards.
The opposite is true if they make long rests harder to achieve and short rests remain the same- then bards , warlocks and monks will be mandatory for a good party and wizzards ,clerics , sorcs etc will be gimped .
