As far as I understood the concerns, it's about making all fanwork equal and, for example, not hide the podfic on the fanfic page? That only works if all fanwork have the same "weight" in title, either with or without an additional category in brackets. But since the system won't allow pages with the same title, the only other option is to add something to the title. I agree, it's a bit overkill to create a disambiguation page right from the start, but the moment a second page with the same title would be created, not only should then be created the disambiguation page (as it is already done now), but also the original page - the one that was created first - should be renamed to add the type of fanwork*. If that isn't done, then there is a hierarchy, either time-wise (page A was created first) or derivation-wise. At least that's how I would read it.

But if it's not about equality of fanwork, please disregard what I said. =)

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* Or other differences. I don't think I have ever seen it, but theoretically there should exist plenty of fanfic with the same title.