Would be interesting to hear the official rationale behind Short Rest limitation.
At this point, even Larian should be aware that such a decision severely hamstrings certain classes, i.e. the ones whose resource is restored on both Short and Long rests. This primarily affects Warlock and, to a slightly lesser extent, Battle Master Fighter. If the company relies on its telemetry when making such decisions, then it's telling you the wrong story, because with the current level 4 cap the difference between Warlock and Wizard might be negligible, but on level 10 it will be... quite severe.