TWCC is not shutting down. Not sure where you even got that notion. I'm doing classic stuff now because I no longer have an agreement not to. The classic stuff is coming. I'm still working on getting the rest of the site back up and running with the new look. I hope to complete that today and begin working on getting classic stuff up. as you can see, I already have sections of the site devoted to it.
As Jesse said, the menu system is the only thing not working currently in IE. We are both working very hard to find a workaround and as soon as we do we'll let you know.