Thinking possible that is reason they have not been in a hurry to do the Tornado-U's and Tornado-S's. Maybe only a Tornado-S with 150km range is needed.
I can understand the delay with the Tornado-U... if you have a 40 tube 122mm rocket launcher firing to 150km then the urgent need for heavier rockets reduces... though their heavier payloads does improve performance on target.
A new launcher that can carry 122mm, 220mm, and 300mm rockets is interesting though... of course with a few modifications like stabilisers you could almost get away just by dropping a couple of rocket pack modules on the back of a tip truck... the best features of rockets are accentuated when you get them in enormous numbers...