Good man, sounds like you’ve got a pretty good all round base. Mobility, stability and Flexibility is so important though as you get older. I stretch every day now and before and after workouts and it’s makes such a difference use a great app called GoWod for this
one of the best things to test mobility and stability is to do a few over head squats with a barbell doesn’t have to be heavy but a few reps of that will soon show you were your weaknesses are.