The problem with calling it a small minority is that we haven't (to my knowledge) seen any numbers of how the 15" with dGPU are selling compared to the other 15" MBP.Question is, does Apple stand to gain anything from providing a dGPU option financially if such a small minority of users benefit from it. So no, I don't have any problem with them providing the option even though I don't need it, but I guess it is more to do with, we don't think they will provide the option - but we are obviously prone to being wrong.
If Apple want to continue to appeal to the users which need portability and the extra power the decision to cut dGPU will be problematic since those users is not as locked in software wise as they used to be.
As we have seen aparture being abandoned, iWork as lacking behind and no real innovating in final cut or logic, the only thing keeping the users which need the power to start using Windows or Linux.