Its not my cup of tea to wear a uniform of any sort, I much prefer civvy clothes with a touch of camo in the trousers. I admit to being one of those that didn't earn it so I won't wear it brigade and I can see the absurdity off it if when you mention reenactors wearing Roman or Civil War clothing. For me its probably more to do with my Grandparents either serving or being involved in war production during the 2nd World War. The respect bit must have been really driven home without me consciously being aware of it.
In regards to a shake up I think its ongoing the younger generation who have not had Grandparents who worked or served have now become more aware of WW2 and now buy uniforms instead of vehicles. Thinking back to War and Peace I saw more young ladies dressed up as Land Girls, Waaf's and Wrens than I ever have before. Where you have young girls you have the corresponding lads as well, good for the hobby bad for the vehicle side of things.
Stoneleigh has changed from being mostly parts to mostly uniform and deacs not that interesting to me anyway (side issue)