I'm not holding my breath on the faverolles, I've never had a hen go broody at a little over six months and I've never had a hen of any kind not lay at all at eight months so the fav sisters are just doing their own thing lol! The ameracuna isn't an April pullet she turned a year old this May, she's just very slow getting the egg factory back online. Her EE and Delaware hatch sisters are already back laying, they did indeed lay through their first winter last year.
Until my April 2017 hatched Exchequer Leghorns started then STOPPED laying this fall, I would have said that based on my experience your April girls should lay all through their first winter. ALL of the prior 2 batches (2012 and 2015) laid their first winter even the Cubalayas. At least my Favs didn't start going broody until their first spring Is your "Ameraucana" really an Ameraucana or is she an EE? Either way, I would expect her to start soon given the April hatch. Is her comb red?