So as a user (example) that does not want to vote, but wants two types of "profiles" of proxy to vote, that user is doomed to choose either one or the other?

I am pretty certain that users that vote for witnesses like me, have a completely way of voting for proposals, again, like me! For me it does not make sense that proxies fill the same bucket. Even if that means less participation. For me, a different problem.

In regards to the work involved. I am fine with the current strategy as long the separation of the proxies is planned and will be carried over in the next HF or soft.