For the proper bikes they're targeting Japan, USA, and Europe. For the latter they need to take into consideration the license brackets, so anything over 47hp continuous is going to get rid of a significant portion of their customer base (and if they can get a 15hp continuous rating but have peak power closer to that 47hp then they'll open it up to A1 licence holders). In Europe and Japan less powerful and shorter range bikes are more viable than in the US, and of course the lower cost associated with that is always a good thing. Looking at their Japanese site they sort bikes into the cc categories of 125-250, 250-400, and 400+.
Not an issue.
Many popular midrange bikes can be bought in a reduced-power 47hp A2-friendly version in the EU, UK and other similar tiered markets (Suzuki V-Strom 650, Kawasaki Versys 650, Triumph Tiger 900, BMW F750GS, etc.); nowadays it's just a firmware limit.
There's no reason Honda couldn't offer a reduced version of its BEV bikes as well, that the owner could legally upgrade the firmware of later, after s/he upgrades the license to a full A. Honda already does this for the CB650R, NV750X, CBR650R, X-ADV750, Forza 750 etc.
Once e-motorcycles selling a bit more, I expect the loophole of selling what is essentially a 70hp bike as a 15hp bike to be closed, so the manufacturers will need to offer two variants anyway.