Don't know that there will be flame wars but there will certainly be some heated discussions and, depending on which FB page you're on, don't be surprised to find yourself "muted" and/or kicked out by the boss babes. The more reasonable pages that are into decent give and take have been, so far, somewhat on the "fewish" side.
Also, to date, vella doesn't have a forum like here on Tapas so all the reporting that we're doing is from different Facebook pages. I'm not sure that amazon will open up a forum, but I don't know if it has one for the KU people so... maybe, maybe not.
So far @cherrystark and I haven't really found any discussion regarding "writing" except on our page. No discussions of character development, exchange of passages for feedback, etc. We do manage to get something going on our page now and then and, I have to admit, I'm not on too many pages, you can only take so much whining.