After all the speculation, information hunting, parts availability issues and of course shop time my 2012 Stelvio NTX is running roller tappets. Took the bike out and found that it is really only a touch quieter but all seems to be working well. For now the bike is running much like it did before the A Kit install so it would seem for my case the fuel mapping is able to work with the roller set up in place. Really glad to have this issue taken care of.