There is a thread in aviation history etc which has some history on the various people associated with the club(s) over the last 20 plus years.
But in that time I don't think there has been a period of more than 3 years where it has had a single corporate owner since Peter Forbes. That must say that Signature whilst the instigator of this last change are only one factor.
It is a difficult environment due to the amount of commerical traffic and the various parties involved - most of whom see light aircraft as no more than an inconvenience. Aberdeen is not a terribly 'clubby' type of place, the microlight club has had a few ups and downs, the PFA/LAA Strut is now dead.
Only fairly deep pockets (initially) and real determination are likely to make a success of things there.