To help with getting your DL off the floor, incorporate some DLs off a platform, I like using a couple 100lb plates, just set it up so your feet are still under the bar. Do this on semi heavy speed sets, when you put your feet back on the floor the weight seems to fly of the floor.
Bench Press I would try to study your form, have someone video tape you and see if you can make adjusments, do you tuck your elbows? Are you using your whole body? Are you pulling the bar apart? Form is everything in the BP, when it finally clicked for me I went up 50lbs!
For Squats I would incorporate regular squats into your w/o's while box squats are great, I don't think doing them every w/o is a great idea. Mostly because you can do so much more with a regular squat and when you go from doing box to maxing normal the weight will feel extremely heavy and will put you at a disadvantage mentally and your CNS will not be prepared for the extra weight.
Just my 1 cent. Good luck on this next cycle! I feel your pain trying to incorporate skating/lifting. I tried to race bikes and lift for years and it never worked, I ended up riding all summer with about 2 light w/o's a week and lifting all winter with roller work. It's all or nothing for me!
