Lmao bro your post made me say f it and I went and rebought the 10.5. I just ran games in them for 3 hours and with a runners loop I was able to get 90% of the heel slip to go away. I started experiencing the pinky toe chafing on very specific plays but for the most part it wasn’t affecting me.try to double up/layer on your right foot with a heavier cotton sock on top of your usual one. If you do not want to put 2 one over the other because it gets too tight at the toe, you could use a longer crew sock for that foot and you fold the sock back down underneath your midfoot so you'll have 2 layers at the heel but only one at the toes.
Both ways usually work very well, it's just a matter of preference.
Now go get these 10.5 back!
But more seriously, bring your game socks with you at the store when not sure and try it out no matter what strategy you chose in the end, that will prevent you from going back and forth or ending up regretting your decision later on whenever buying new shoes.
These were super fun to play in and I imagine it’ll only get better as the insole molds to my feet. It’s weird I still think they fit a little long but after getting the pinky toe rub I don’t think I’d be able to make a size 10 work in game situations. I’ll be sending them back officially and stick with the 10.5. If the mids supposedly fit a bit more narrow and tighter than the lows I feel they would accommodate me way better. May scoop a pair up on the low if I can find one.