Big fan of Etymotics (not that the thread name hides much). This is great news -little late to this party as I was out and about.
I think with a slight bass bump the XR version could really be made to be extremely competitive with more "modern" earphones (i.e. less neutral tunings). It'd be a great refresh and I do look forward to seeing what you guys will do with it. No pressure-but great expectations. When I first reviewed the ER4, I hadn't expected it to become my go-to earphones. Funny thing is, I'd be hard-pressed to name another earphone that has quite the speed and the clarity of the ER4, even on some significantly more expensive flagship models. It's something that I do keep coming back to.
A lot of excellent points have been raised so far, but I'd like to add that if you guys are still going with the same plastic connectors (except MMCX this time around), it'd be nice if you could remove some of the flashing/ mold lines from the bit. It'd feel a lot more premium and is definitely one of the more bothersome aspects of the ER4 from the previous generation. Also, a harder plastic would be nice. It's really easy to scratch the connector bit on the stock wire when removing/changing cables etc.