Your bulletpoints are messed up.

Your new system point 1 and 2 are the exact same thing.

Also you can get 3000 tp, and if your skill only uses 1000 then you got 2000 left and you can do another 1k skill and have 1k left and do a third 1k skill, woah with the power of math i've discovered you can do the same as before.

If anything Stamina slows you down because in order to do a lot of attacks at once regardless of TP you need stamina up, you're always waiting for it, and you need it from 0 to 100% which can take like 5-6 seconds, where as without it soon as you hit 3000 tp BAM BAM BAM you can get those 3 attacks out instantly.

Even in the video he selects his final Glad skill the moment he did the previous one, hes on like 900+ tp and his auto atk tips him over and he can do the skill right away, doesnt need to wait for stamina.