I Tivo the "Live From Darrell's House" (LFDH) TV episodes. Many times these episodes feature Taylors.
Darrell Hall's ex-producer, Tom "T-Bone" Walk (that in recent years passed away) seems to be playing a Taylor full body (no cutaway) jumbo that is (my guesses) Maple back and sides and possibly Cedar top, /w old-style barn door preamp and UST.
Over many LFDH episodes Mr. Walk used that guitar for rhythm, leads, and slide.
That guitar sounds great, and cuts through the mix.
My point is, I'm seeing recorded evidence of a Taylor full-body acoustic jumbo in a live mix being played in 3 different modes (strum, slide, & lead) and it sounds good.
I think the pairing of Jumbo shape and Maple tone-woods is a natural, to add some body to the Maple's brightness. Also to provide an alternative to the the Gibson J-200.
However, @Steve is likely correct that there is probably not much of a market for it.
IMHO it would be wise of Taylor to have a path to this type of guitar on a BTO basis.
-Gary K