I drove the car and everything grabs nicely in street driving. NOthing sticky with the pedal, everything was nice and smooth, good pressure and engagement point. One time it didn't want to and/or jumped out of 5th.
I did 35mph on the highway and put it into 5th and it worked, slow as crap but expected and it grabbed on and made it to 70mph.
If it pops out of 5th gear, your transmission has the problem, not the clutch. But if it happened just once, I wouldn't worry about it.
The load test you did from 35mph proved your clutch works just fine.