Naaaah, they just don't want to do any "unnecessary" work. People behind Gateway pay the developers big sums of money to do the work and they resell it.
They released the downgraded mset for the N3DS long ago, so 9.2 N3DS users would just use that jst like 4.x systems... Since then people with 9.2 systems begged them to add support for the o3DS... Never did... Even free CFW's added support for downgraded mset for o3DS.
Then Menuhax came over and people have been begging them to add support and they always come out with some excuse, there is no brick risk, Menuhax is just another entrypoint like Cubic Ninja, it is obvious to me that they don't want to pay for it, in their ideal world all o3DS users downgrade to 4.x and N3DS users downgraded mset... And they don't need to work in another entrypoints...