Rottweiler:
Initial issue ME IR(H), as done with the CAA, is no more difficult than a mil IR just different. Most mil guys will agree that the CAA IR is difficult, but that is because:
1. Minimum hours in training beforehand because you are paying for it...
2. ...leading to mininal hours in an unfamiliar aircraft.
3. Working single pilot as opposed to 2 pilot (unless you are 32 Sqn)
Once you have crossed that particular hurdle, company IRs are no more difficult than a mil IR. In fact they lack the stab out, limited panel, SE approach that I used to love so much...!
I refer you to the introduction to service of the 412 in Cyprus - accomplished in 6 months! (although not without its problems, but that's another thread altogether) as a counter to (one of) your points