There are several Far Field IRs that are available in the Axe Cab block that will give you a closer approximation of the "amp-in-the-room" feel when using FRFR speakers.
People always say something like that in threads like these.
But I have yet to hear a far-field IR (including Jay's.... especially Jay's) that sounds anything like a good cab in a decent room when monitored through an FRFR cab.
I actually think the OP has a point.
The state of the art tech we have now with mics, mic preamps, convolution, etc., just isn't up to the task of even coming close to recreating the sound of a good cab in a decent room, especially an open-back cab.
IMO Some sort of other approach, not based on mics or IRs, might be able to get us a bit closer.
I think that with a really advanced multi-band filter designed specifically for this purpose someone with enough patience might be able get himself quite a bit closer to the stated goal.
My own experience is that simple filter boxes like the H&K Red Box or the Palmer PDI can come pretty close to filtering out the relevant frequencies from a full range signal in such a way that an FRFR speaker is limited to the frequency range of a guitar speaker.
I.e. They make FRFR speakers sound like guitar speakers.
Of course there's a whole bunch of other things that these types of simple filter boxes don't do that always makes it feel like something is missing still.
But I do find that boxes like this come much closer than any IR of any mic on any cabinet that I've heard thus far.
I've gotten pretty close to duplicating this type of thing in the Axe myself using a few Filter Blocks and a PEQ Block.
But I don't really know what I'm doing so it's all hit and miss.
I think that if there was a dedicated multi-band PEQ effect (more than 5 bands) in the Axe where the 2 outer bands could have a very steep order LP or HP filter.
I think that having some additional time-based processing within this effect block might help in simulating the boxiness of a cab or the weird shit that comes out of the back of an open-back cab, etc.
But again, I don't really know what I'm talking about.
I'm just thinking out loud.
And I know that the first response to this suggestion is going to be from people telling me that this can already be done with the tools that are already in the box, and I do agree that that is true.
I've done much of this myself already.
But I still think a sophisticated powerful PEQ block dedicated specifically for this purpose would make the whole thing much easier and viable.
If an effect block like this uses a lot of CPU then it might be balanced out by the fact that you wouldn't need an Cab Block in your Presets.
Flame suit on....