It appears in recent posts that we've moved a bit from giving more narrative control and/or more to do than just hit things into removing the need for spell casters at all. I cannot say I'd be any more for that than I would the current state of affairs where spell casters don't need martials.
Concur. I agree that there is a martial-caster disparity, and that it's not a good thing as it stands. But while I would totally like to see upper tier casters reined in so they're not as widely role-encompasingly powerful in potentially so many areas at once, and while I would also like to see martials be given more areas in which they can contribute either on par with or exceeding what straight-up magic can do... that doesn't mean that I'd go so far as to say that an all-martial party should necessarily be able to fill all possible roles, or at least not without some extreme inefficiencies.
I don't personally see a problem with the game stating that if you want to (just to pick an example) travel to a different plane of existence, then you really do need magic for that. And if you're committed to an all-martial party then you're probably going to be paying through the nose (or go through some other comparatively extremely inefficient method) to achieve that kind of travel.
If you don't diversify your approaches, your party might well end up taking on a much tougher row to hoe. I don't think that that's in and of itself a bad thing.