Ok tested this thing when I woke up. In sysnand mode, eshop spoof app doesn't work. I'm assuming because it boots 9.6 patched native firm. I would suggest you find a way of live patching 9.2 for sysnand mode at some point. Some folks might want to use eShop. That and the ability to boot into another CFW while in the Cakes would be convenient.
For me I guess it doesn't matter. I have an early test build that boots sysnand using 9.2 firm. It's not in a user friendly form though and I patched 9.2 firm myself.
I sent him 9.2 patched firm awhile back when I first made it. I'm sure he'll find a way of incorperating it. (hint look at Pasta code. It doesn't use firmlaunch to launch new native firm yet.
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Pasta is open source. There's no harm in using some of it to get sysnand mode working correctly.