Re the commissioned rear crew, why commission the front end either?
By front did you mean the Navs? If so it was because of the dustbin. Now as there are no dustbins and no multi-stranded roles there is probably no reason why they should not be NCOs.
One small stumbling block would be if they tried to resurrect the trade as a fallback for chopped pilots who would already be commissioned.
Now here's a thought (thread drift), u/t pilots were commissioned and given flying instructional pay as an inducement. Then it was realised they didn't need FIP as an inducement so they stopped it. It would save a fortune if they commissioned at the wings stage too. This would not be as novel as it may sound for although DEC officers were commisioned after 4 months the career stream officers at Cranditz served 3 years before commissioning,