I wish Google had added the emojis to the appstore years ago and made them updateable independent of the OS release. My phone will not get the upgrade to N so I am stuck with the old emojis unless I install CM14 in the future.
Another problem is that there are way too many emojis on the keyboard and it takes ages to find the right one. There should be a "long press -> hide this emoji" option in the keyboard to get rid of the 75% you will never use.