Getting the dev email list to agree to a change of something that is easily added through packages or just init.el/emacs.d/ is difficult if not impossible. But this is a good thing: opinionated workflows are adaptable but not forced on seasoned veterans and newbies alike. Getting good packages into elpa or tasteful additions into core that augment emacs is always welcomed it seems.
Join the development list and just follow discussions. It's always fun to see really smart people talking about new code, extensions, opinions, and the new maintainer John seems to want to do a good job and produce some nice software. I've got it going to my gmail under a label and never filling my inbox so it gives a nice reading break every now and then at work.
But being non-core is not really a barrier to installation in my opinion. In many ways it is a plus, allowing for out-of-cycle releases and to experiment / break compatibility at their own pace.