Don Quixote was reputed to have jousted with with windmills he perceived to be dragons. Some process improvement programs see problems where none exist. Just because a process is not the newest, brightest and shiniest concept does not mean it is not functional. While I would suggest care be taken with the “it isn’t broken, don’t fix it” mentality, care should be taken to spend your precious time and effort on areas that have the highest payback first.
If you have not already done so, develop a process improvement backlog based on input from practitioners and from benchmarking studies. Prioritize the backlog based on the value each story or change can deliver. Use data to determine the impact of the changes not just gut feelings.
Ask yourself if your process improvement program is adding value because if it isn’t then you jousting with windmills.