Gachi and you have the weirdest argument. Compared to Grens they cost 40MP more and vs VGrens it is 15MP more. Where is the 80% coming from?
JLI are 1CP, so them being competing DPS wise while having significantly better RA vs VG is a win. They have stock cloak and first strike gives them a 25% DPS boost. They have vision to make use of their better DPS profile, so when you move in with whatever unit you want they can take shots at you and then sprint to reposition or just straight up retreat and not incur any bleed.
It was an answer to the argument that k98s "exceptionally good close range damage" so I came up with a hypothetical simple cqc engagement with a squad of cons (a.k.a gang of bums).
I still think that the JLIs are not the problem but the doctrine is. Overwatch has too much of good stuff.
For example "Scavenge" is not near the top yet it has JLIs. If JLIs were so great, that doctrine would have been meta as well.
Yes, it is one of the best units in the game but I would not call it OP, not in a million years.