I’m not sure this would be a good idea in this kind of change.

Flapping is bad in the networking world.

Flapping BGP routes, specifically, is bad because it can stress all BGP routers involved to the point where they can “go crazy”. Routes are explicitly advertised, so if you keep changing the routes, you are tasking the router CPU to process new stuff, discard it and process new stuff. In fact, BGP route flaps are specifically the focus of an entire RFC: https://datatracker.ietf.org/doc/html/rfc2439

More in general, a flapping link (on/off/on/off) can really mess with TCP.

Flapping in the networking world is not something you want to do intentionally.