I had the same problem last year and it fucked my season badly though my boots were a bit old and packed out.
I bought some new boots this year and its solved the problem to some degree. I wear Thirty Two Lashed in a size 8 and my toes still get a bit cold/numb after a few hours and especially if I am hiking in the snow. My buddy just bought some new TM-Team and said that he finds that the toes aren't all that insulated either. I'm getting some decent footbeds and I went back to canted footbed in my bindings this year which has helped a lot.
just my 2c on the issues I had and whats started to work