Also thinking a smaller qa snow plow or pusher mounted on loader arms seasonally in place of bucket is probably what I'll go with eventually. Also assuming I need third function to rotate blower shoot or angle a plow?
JD doesn't offer loader-mounted snow blades for the smaller CUT's (like 1 and 2 series) presumably because they don't think the loader structure is up to the stresses. You can get aftermarket (Curtis) loader-mounted snow blades that will work on them and some people on here have them. I have not heard of anyone having a problem with them, except that the smaller tractors aren't heavy enough to use them - they wind up being pushed sideways by the blade set way out front.
As for the blower chute and blade angle - with the JD frame-mount blade and blower, it uses one of the loader circuits for angle and the other to raise/lower, so you wouldn't need a third function.
I kicked myself in the rear for 20 years because I didn't get a snowblower with my lawn tractor and they quit making the model that fit it not long after I bought the tractor. However, that generally isn't the case with the blowers for the CUT's - JD tends to keep the same old models for blowers forever on them - although they did upgrade the CUT blower from 47" to 54" 10 minutes after I bought mine, so I wound up trading for the bigger one to cover my tracks....
My personal experience with the frame-mounted blade and blower is that they are a pain in the neck because you have to remove your loader to use them. Also, neither one works particularly good on gravel without some modifications like gauge wheels, etc. Consequently, I never use my frame-mounted snow blade and only rarely use the frame-mounted blower, but I have them because they are neat attachments to have.
If I really needed to use a blower, I would buy a rear blower for ease of attach/detach even though it would be harder to actually use, i.e., having to run the machine in reverse...