Not sure how many people are opposed to a change of title per se - perhaps more that the new title is inappropriate and well - 'Naff'.
As I mentioned previously - the RCAF changed from 'Private' to 'Aviator' in 2014 for similar reasons and yet 'private' was a gender neutral term already ????
Try to improve all that is seriously wrong/substandard with the RAF = Too Difficult
Spend lots of money changing a title which might offend 1% of members of the RAF and at the same time filling in the 'inclusive'/'diversity' Box = Tick