1) Yes, Zarafa is dropped completely
2) No, as of 3.4 there is no option to choose Zarafa anymore.
Sad to hear that, as Zarafa - IMHO - is a very good and stable Groupware Solution, esp. in conjunction with z-push it works like a charm.
3) _Theoreticly_ OpenChange has more features than Zarafa and there is no extra license fee for outlook connectors since OpenChange natively supports the MAPI protocol.
As u said... theoreticaly... I took a look at OpenChange (WebMail) in Zentyal 3.5 and my first thought was: What a huge Back-Step!
4) We would love to see a documented migration path for Zarafa to OpenChange. I hope the devs in Zaragoza have the time to make a solid howto and/or migration script for this.
Thats annoying... this would be a big show stopper for many Zentyal Users in Upgrading / Migrating I think. I couldn't imagine that there are just a few users having Zarafa running in Zentyal. And if there is even no migration path...
IMO the biggest catch is that openchange just isn't stable yet. Although they are working very hard on OpenChange development, I really think it is too soon to drop Zarafa, but that's just my opinion.
I'm absolutely with u in saying that it is much too early to completely replace Zarafa with OpenChange; just installed/tested Zentyal 3.5 for a few minutes and came accross several Bugs (ActiveSync doesn't seem to work, IMAP Login with non-Outlook doesn't work) and created some tickets.
What about all those who don't need the Outlook/MAPI stuff but just a Groupware at all and use completely free software? I think, having the choose in using Zarafa or OpenChange should be the better way as Zarafa (esp. with Z-Push) in Zentyal worked just fine and stable for several years now.
So I think, 3.3 will be the last Zentyal I use and I will completely switch to another SBS Solution like ClearOS...
There the Zarafa Community Edition "App" costs 10$ but that could be good invested capital I hope. At a first glance, this System seems to be more stable at all...