I think for it to be overdone you would have to argue that a proportion of those observing silences or attending parades, or even buying poppies, we're doing it simply because they wanted to be seen to do it - rather than thinking it was actually the correct thing to do.
I am not convinced myself. In a day and age where we suspect the Military Covenant to be a cynical ploy I think the public generally support the military and even those that don't can distinguish between supporting a cause and being thankful for the sacrifice others make.
Through media and from the prolonged nature of ops the public probably have a reason to feel somewhat more engaged one than they have in the past.
Perhaps one of the posters from the US would like to comment on the concept of over doing remembrance?
It's one weekend out of 52, I personally don't think it is over done.