I think this is the first time other player said the same thing I though myself. I started this game because SPT was the only game there with enough action but was not any close to the kind of active feeling I wanted to feel in VR, and this is the reason why I tried to make different kind of experiences, and specially experiences you can enjoy running around physically while playing.
About the waves stuff, the game has too much different stuff so at the end I decided to make short waves to make it easy to know what every weapon works like, but the action stops too often. The slash mode challenges are the non stop waves, kind, but also, after this slash update, I think I will set a main survival mode where players can pick an equipment (unlocked completing stages) to play for so long as they can.
I have lots of weapon prototypes, addons and similar stuff, but without custom 3d models. After the slash update I will try to show you all the stuff so you all can decide what you would like to try to include in the next update. There is very different stuff, from an external snipe dron controlled by a camera in the wrist to a whip like chain, shoulder cannons that can be extended or removed, or two sentry machineguns handling mechanisms. Just, no 3d for them yet, I made the tests with stuff I can't include for a real release.