I've been saying for months KJ is really good on Breeze. The turret is really powerful on that map with all that space to watch your back (or front) for lurks as well as for flanks on attack. The alarm bot can still be used in tube or for pushes as usual. The only thing I was iffy about was the ult, but Dapr just showed it doesn't need to take the whole site to push people back or bait people to come to you. Sure, dealing w/ the range limit sucks and the new 20 sec recall time limit is trash w/ the recent nerfs, but I still really feel like it allows you to play the map in more interesting ways.
tl;dr: KJ = good.