-Space maps while already broken, are even more broken. This is because it becomes extremely difficult to kill campers that have a nex, because the CR is effectively useless against them despite its higher fire rate you just end up fragged.
Also people rocket jumping, lasering in the air etc. as you are all aware far more difficult to hit with projectile weapons than something hitscan. This simply leads to people laser jumping around like an epileptic watching hypnotoad and capping every which way and that.
-On other smaller indoor/semi-indoor maps however the lack of nex can be quite fun. It does stop people camping quite so much and initiates an awful lot more close combat which is fun

-It becomes increasingly difficult to kill people who have invulnerability/highly stacked health as the nex was a staple of more push/damage doing. No the rocket launcher etc. just doesn't quite do it because of these people will be moving very fast rendering it and other weapons almost useless.
So I dont know if my opinion is flavoured or not, but I'd say the balance changes can be quite map dependant. It really depends a lot on the kind of game you play.
I'll play more games once I'm back on Monday and post some more feedback. Oh and I actually quite like the CR its fun to get random mid air headshots.