Re: Tread carefully here.
In the long run it is probably cheaper to change people (or at least the roles they do)
The number of companies I have been in where roles are massively duplicated is unbelievable, in some places roles exist that essentially unwind what someone else has done. A good holistic strategy should prevent this which means good business practices which suggests a solution might already be available.
Even if moving to a standardised solution is more expensive it could be cheaper in the long run due to decreased technical maintenance and increased throughput (and potentially non-IT resource savings)