I had the original rMBP, now the 2014 one, and don't see the same problem. A lot of it is in the persistent services that are running on the machine; I'd take a good look at Activity Monitor's "energy" pane. One thing I noticed: if you're using Chrome and have persistent pages open (cough, GMail, cough), this is probably a big part of your general heat issues. It made me go back to Firefox for a while, but Firefox's habit of occasionally just locking up because something crunchy is happening in a page was even worse.
Open a video hangout in Safari. My early 2013 rMBP would go to 200 degrees per iStat and stay there for the duration of the call. Skype would keep it around 160.
It does! Safari is much better at battery life. But, for my use cases, it's an unusably poor browser outside of its rendering engine. My extensions don't work within it, I can't easily find equivalents, and there's no easy, good way to sync between Safari and browsers on Windows (Xmarks hosed my bookmarks so badly that I haven't yet even fixed all of them).
