Yes, it has always been wonky. However, there are degrees of wonkiness and this is quite a bit past being at 1 hit point without penalty. I'm personally fine with walking around on a light sprain and not seeing a doctor. I can't say the same about a broken ankle.
I'm going to try a long rest taking a full week to happen and spreading out the encounter day. If that doesn't work, I'll try something else.
My group has played 5e, but my first time as DM will begin in January, so I'll know more about what I do and don't like then, and know better how I'm going to "fix" the things that bug me.
So, the wizard and sorc will get their slots and most abilities back over a week's rest but fighters, warlocks and other short rest guys are hourly rests?
i will be very interested in hearing how that goes.