When the time to port the THAW maps come,i just want to let you know that the Hollywood level (not sure if only hollywood has this problem) has some collisionless spots,even though you can easily get there.This obviously makes combos harder.
Yellow wall is unwallridable:

This ledge isn't grindable,you can get stuck here pretty easily if you're proving,and this will finish your combo.

Both walls are unwallridable.

Brick wall has no wallride collision.

A wallride in here looks pretty good when you're proving,One problem.You can't wallride here.

And many others.You can still sticker slap those walls though.