I'm so excited about improving DISE, and of course supporting Riptide. With all of your cooperation and heartfelt donations, you have my big and warm THANK YOU SO MUCH! :D
Quite a bit of progress has been made so far, and thanks to daring people in the public chat room, DISE -- or the catchy name given by its fans, RISE -- was tested quite a bit this/last night. At this time, DISE can modify most of the important things; however, not all of the game content has been put into DISE yet. It doesn't really prevent you from adding Riptide weapons to your inventory, as long as you know the internal name of the items and use the "custom item" feature. The new skill trees are not supported yet, but you can still edit the old trees and hope it works out alright.
Will see if I can release an update for everyone in a bit. :)