i noticed the same thing that most of you are saying. that's why i ended up with my m9 and they work just perfect.
the toe strap design doesn't work well if your boots are elevated in the toe zone like "rockered".
For reference I am using 11.5 Vans Aura and it does have a rockered toe.
They don't slip right off but just give them a yank. There are small barbs keeping the strap on but they won't stop you from getting it off. They're just enough to keep you from loosing the strap on the hill.
Once I did the switch the toe cap on my front foot stayed where I placed it whole time. Good props to flow for a stay in place toe cap if your not in and out of them.
The rear did good but there were a couple of times the LSR unlocked and I must have hit the cap while I was skating and made it too tight, so about midday I pulled it off and went without.