HIMARS Live Fire Certification at Fort McCoy (Why aren't we working on the next gen?)

Note. Why aren't we working on a Himars 2.0 right now? I'm talking several versions too! How about a launcher that has the same number of missiles that fits on a MTVR or Army 5-ton as on the tracked version? How about a MLRS that can be based off the JLTV? Why not a few robotic types that can be airlifted by KAMAX UAV and dropped on a spot, monitored electronically and can fire on demand? We seem mighty comfortable with current development instead of moving on with the next gen.