Re: the GC stuff and housing, yeah both have been confirmed for 4.1 in various publications, interviews... but you're right they are often ambiguous with these things and Yoshida's 4.1 could also mean splintered off to one of the smaller patches like 4.11 or a 4.1 part 2 which is really a 4.15.
PvP is on the list of contents confirmed over and over for 4.1 but I would not be surprised if that's in a smaller 4.1x patch as pvp often is. Taking squadrons into dungeons was confirmed to have slipped from 4.0 to 4.1 but it's been quite a while since last mentioned and everything is subject to change. But yeah my list is all the things yoshida said at some point is 4.1.