Cap'n Kobold
Hero
An 11th level Wizard with a 3-level Sorceror dip could do 22 attacks in 4 rounds of combat, all with advantage, all dealing more damage than the fighter/ranger, suffering no attacks of opportunity from moving between targets and with disadvantage to hit them.I think this would be abused. An 11th level fighter with a 3-level Ranger dip could do 20 attacks in 3 rounds of combat.
Think about that - This isn't AoE damage, where casters seem to be meant to shine. In a situation involving moving around and making melee attacks, the caster is better than your suggested martial.
Often because they are only 1/3rd the power of a long-rest ability.Short rest abilities are short rest limited for a reason.
Most groups seem to run off less than 5 combats a day with a single short rest. Having the occasional 12-encounter, 3 short-rest marathon does not bring the average back to the 2-SR day.TBH I've never seen it as a problem. Sure a majority of the time they have less uses than a long rest character, but on the other hand on long adventuring days they can top up pretty easily.
The 2 short rests and 6 combatsper day is supposed to be an average and as a mean excluding days with no combat I would say it is probably accurate. The median is lower than that - probably more like 2-3 combats and 0-1 short rests. But there is a floor of zero and really no upper bounds and on those long days short rest classes are much better.