More updates: this beer got me Honourable Mentions at the Leuven Innovation Beer Festival last weekend.
Jury notes are due someday soon, I was told, but I talked to a couple of brewer-jurymen and the general consensus seemed to be that it was definitely the most innovative beer of the competition, but didn't take prizes because of balance issues. I can relate.
That being said: I've not yet come across anyone who said they didn't like it. No one's going for seconds, but overall, whoever gets a taste seems to be in favour of the whole idea.
I think it needs a better hibiscus/ginger balance. Now, all the hibiscus seems to do is contribute flavour and thin the body, with the ginger hogging all the limelight. I'm wondering if maybe Belle Saison wouldn't be better for this type of brew; I think it's fruitier than 3711. OTOH, I think Belle Saison needs a LOT of time to mellow out. Young and raw, I think it's pretty vile. 3711 seems to be more forgiving to being consumed young but in this beer, maybe it's too much of a distraction.
Definitely going back to this recipe at a later time.