Also keep in mind that every remote tuner takes up one virtual tuner and that amount is limited. The exact amount various per manufacturer/model, but it can be as low as 2.
I know, that's why I also commented about the need for a possible "dynamic" use of vtuner interfaces (that would require satipclient functionality to be inside enigma2) and also to make it possible to use different FEs on same vtuner, like the tuners that have S/C/T capability.