As an aside following the original review of IOT that did resulted in the 30 week course way back in the mid noughties a suggestion was raised about the possibility of combining NCA and IOT so that rather than do Halton and a separate course at Cranwell the NCA cadre would do the first 20 weeks of IOT before graduating and the IOT cadre would do the final 10 week 'commissioning' term. This didn't survive first contact with the seniors with a major concern being 'what if the NCOs perform better than the Officers'.
There are a number of options for the new IOT/RTS that have been floated around the bazaars - mostly to do with modularising the course in order to streamline training. One of the driving forces behind the modularisation being the 'efficiency' of airmen who go for a commission having to undergo the militarisation phase or should they join later in the course? There is currently a trial of former Flt Sgts joining straight into Term 2 and of course former WOs only do 2 weeks at the end of Term 3 albeit on their own bespoke course.
With regards to new entrant airmen and officers being combined I suppose they could do the same militarisation syllabus on the same real estate but as separate flights. Furthermore, I believe the Daedalus Mess proposal to be one of many covering left and right of arc as it sits on the North side of Cranwell and the intention, ever since the idea was muted in the early noughties, is for the North Airfield site to developed and cost will undoubtedly be a factor to make best use of what is already there.