Well I really like the new upgrade system, but I will agree with Chuya on that, you must have a fail chance after +10 or need more kits upgrade not 5 but I think like 10 will be okay! Also give just a bit higher chance to drop like +0,5 more! Keep going Verdant, you doing great job. And one last thing, you should create a kit for the lvl 60 and 65 gear, might a U66 kit 
Also....
#VoteTasokuForEventManager 
(Just kidding for the event manager)