Adam, I hope you feel better soon. I've been in a slump lately myself with a broken wrist. I crushed the radius and broke a chunk off of the ulna in my right hand. I get the K-wires out tomorrow and the fixator in two weeks. I can't even squeeze the shutter button yet.
I think the A6300 photos look great at high ISO. I'm not a pixel peeper. Adam, that size difference is significant! There's no way I'd go back to lugging something like that beast for pleasure. As a matter of fact, I've been playing with a Nikon Coolpix A.
Wishing you a speedy recovery. I'm seeing an orthopedist tomorrow... been in pain for almost 3 weeks. Today isn't quite as bad, so maybe it's less serious than I fear.
I admit I pixel peep, it's a bad habit. But it also gives me far more cropping latitude. And additionally, though the DXO testing suggests the dynamic range on the A6300 is quite good and close to the D750, there is something almost magical about the D750 files in post.. I believe dpreview has called it "ISO invariant" or something like that. Basically, almost no matter how unexposed an image may be, I can lift the exposure and shadows in post processing on the D750, with very little noise and IQ penalty. On the A6300, if I push shadows over +75 or so, I get punished with ugly noise. Same if I try to push up the exposure by more than about a half EV. Regardless of what ISO I shot with. On the other hand, with D750 files, I can lift shadows by +90 - +100, I can lift exposure by 1-2 EVs, and the images still look fantastic. Gives me a ton of latitude in my landscapes -- I find I mostly stopped doing bracketed HDR on the D750, because the files had so much room built in. On the a6300, I'm back to bracketing my exposures for HDR for my landscapes.
And portraits.... between the shallower DOF on full frame, between my higher quality glass, and even the ability to lift shadows, I greatly prefer my D750 for portraits.
But yeah.... knowing I can still get good images with the much smaller set up.... and knowing I'm not getting younger... and Disney is often 5-10 miles of walking per day... the A6300 with a couple of small lenses is sounding pretty nice.
The coolpix A is fixed focal length APS-C? How do you like it?
My interest in photography is too eclectic for a fixed focal length camera. But, I teach a photography class, I'm thinking of adding an assignment of telling students to only use one focal length for a week. I do think you become a better photographer when you can't just stand still and rely on zoom.