Simply showing how many cadets and CFAVs are in the ACO in a given year might not tell the whole tale. Each year, hundreds of young people join the ACO in the hope of Venture Adventure. An accurate gauge of morale might be to measure how many of those recruits stay for more than, say, 3 years and then determine the reasons behind leaving.
A similar story for CFAVs: there are many reasons why they might leave; age, pressure of work, change of career etc. Again it would be necessary to know why they had left rather than assuming that it had anything to do with the lack of gliding.
On the question of the suitability of OC 2 FTS, it is worth noting that Comdt ACO accepted his application and nomination when he was already beyond the mandatory retirement age for FTRS (which is 65). I'm not defending his performance in role (although it could be argued that he has made the ACO gliding organisation safer than it has ever been), but he was either the only candidate, the best candidate, absolutely the right man for the job, or some other reason.