My skates get very wet inside, irrespective of the insoles used. All I do is pull out the speed plates when I get home, and they dry out just fine. As someone else said, just push on the opposite side to the arch support, and then slip a finger under the arch suport, and pull the insole out, easy peasy. I have not noticed sweat unduly collecting beneath the speed plate. I skate for an hour or two in public skating sessions, and I am learning to play hockey, so moisture build up might be more of an issue to more serious players.
The problem I have is that I use the PowerFoot inserts. They are great, but they soak up sweat and get very very wet. They take ages to dry out. This is a serious flaw IMO.