Getting Old

My usual routine of building up muscle and training it down is coming to an end.
I've reached an age where I've realised the image of an oversize, lump of muscle is neither positive or of benefit to me. I am after a visit to the doctor judged by the blind scale of BMI to be clinically obese. I've always been active, I'm on my feet and walking, running upstairs, wrestling people all of the time I'm at work. I trainn hard cardio and high rep weights and have a muscular physique. The dumb assessment that my mass exceeds a safe limit for my height is not something I take too seriously.
It does flag up that I'm an outlier. That what I've been doing over the years with my build has placed me in the extreme of the distribution and as I get older this will only be getting more apparent. It's time to slim down, up the fitness and do with technique what I've been doing with body weight. I'm not going to be disappearing anytime soon, hiding behind lampposts or being confused for a marathon runner will not be me. I think I'm just aiming to turn some of the overdeveloped musculature into a more conventional broad shouldered sporty build.
We'll see how this goes down at work. I'll still have a face like a bag of spanners and all the lessons I've learned so far but being smaller will reduce my physical presence. Will this lead to more grief or less grief?