Quote - So basically do you feel that is it fair to complain that these INJ poses don’t work correctly or is that just the way it is now?

If they were for the original V4 then you have to take into account that all the deltas were preloaded (the same was true of A3 and H3), so any INJ poses made using either IPB or IPM would (correctly) not actually INJ any deltas.
A lot of newer merchants will just use whatever tool they have to produce files with a limited (if any) understanding of the technical details.