Hi Jan,
I too am in a similar position to you in that my Dr suggested removing my Medtronic SCS and replacing it with a Nevro SCS as the Medtronic one just hasn't worked for me.
I didn't like the idea of removing the entire implant and I have suggested using the existing leads which work and replacing the battery to the Nevro, (I believe you can only get the Nevro in Ireland and the UK) but anyway, my leads haven't migrated and my Dr is considering going with this route.
It is possible your new Dr just wants to start from scratch and not inherit another doctors problems, what SCS do you have in?
Keep in touch and let us know how you're getting on, how are your pain levels, did it give you any relief when it did work?
All the best
Sinéad