yeah, I think going via talkers is a simpler approach…
what are you trying to do exactly?
what do you mean by ‘everything’?
belcanto is mainly used for reconfiguring things like keygroups, or creating rigs … as you say creating setups.
for simpler stuff (switching octaves, activating different keygroups) most of this is done via talkers.
I cannot really see it being that useful to try to program a setup via midi, even if it did work, it’d be really cumbersome, and very slow (compared to loading a different setup) - I dont really seem practical benefit to it, even if it was to centralise your setup.
many of us that are trying to have a more centralised setup, tend to move most of the hosting/translation logic into a daw/max or whatever - you could relegate the eigenharp to a controller if you wanted, just take the raw key outputs, and send midi to set the less … that way your daw/max would be in full control.
as i say, really depends what your goals are.