That does seem to be the more common (though not exclusive) play experience.I often get the feeling that the designers thought short rests were fairly easy to get, so they overvalued abilities you recover on a short rest. Had a short rest been like in 4e, about 5 minutes long, the warlock recovering their spells on a short rest would have been amazing. But instead, at least in the game I'm running (Princes of the Apocalypse, so fairly dungeon-heavy) it seems like the number of situations where the PCs could take a short rest but not a long rest is fairly small.
It really makes me wonder how a house rule that all "recharge on short rest" abilities are multiplied by three and recharge on a long rest instead would work. Has anyone actually played with something like that? I'm sure it would be a bit uneven, but the disparity between long rest and short rest classes is probably my biggest complaint about 5e at this point.The assumption is two short rests a day.