I can only imagine that this debate started from
DUDE's video, which explains more in detail on why the Rapid is very strong right now. There's some stuff he glosses over(Jump RNG making the shots much less accurate at max distance, directing with it actually does require good aim), but it's indeed a force to be reckoned with right now.
I can warn you right now, nerfing it will have no effect. It'll eventually make people migrate back to the Custom Blaster instead. Why? Because
literally no other blaster is viable in high-level play. If you need a blaster, you gotta go with rapid because it's not bad like the other blasters out there.
Luna's been a trashed wreck from the beginning. You literally get a Blaster that has less range and more endlag, the bigger damage radius is gone. It's like if you get a dynamo with the range of a Splat Roller. It's a downgrade to the regular blaster in all aspects, and that'd be allright if the kits were good on it but... They get outshined by the kits on the Rapid.
Range Blaster has been exiled from the meta eversince the damage recovery buff, and it got no compensation for it. You still have to deal with a 200p inkstorm. You now have to keep hitting shot after shot because your fire ratio is so slow targets will now heal between hits, something which the rapid has no issue with.
Clash is getting close to useful, it's kits aren't perfect however and that's the biggest thing holding it back. Stingray/Missiles on such a short ranged weapon is hardly useful, but both curling/bursts help it a lot in maneuvering around the field. The only thing it's really good at is pubstomping because very few newbies know how to deal with it.
So if you're in high-end level play, the only options you have for your blaster needs are Rapid(Pro) and Custom Blaster. Rapid Deco and Custom Blaster share the ever-powerful inkjet, however Deco gets suctions and Custom gets chickens, you don't want chickens so you go with Rapid.
vRapid is no joke either, having the very strong Splat Launcher and it being the only weapon able to utilize Ink Mines well. vBlaster used to be good until Splashdown got nerfed.
I've been saying it again and again, but nerfs are what this game needs the least amount of. Nothing in this game is truly broken, but there's plenty of underpowered stuff out there. Luna can actually be decent if they give it's blast radius back. If they somehow could give an extra kit to clash with a special that isn't bad for it it'll help it a lot. Range's kits are fine, but it's dps for indirects is too slow to make it meta-worthy.
And finally, finishing off this long-bloated post:
Please stop incorporating honor in your weapon choices. It's ridiculous, but i keep seeing it happen constantly. You aren't inherently better for picking E4K over someone who picks Rapid Deco. You can certainly play the weapons you'd like, but you have to understand the meta and the fact that if you don't go with it that you
will put yourself at a slight disadvantage. The game gives you weapons which you can potentially accomplish your goals with, not picking one because "it's for scrubs!" or anything makes you well... a scrub, basically.