Well, I was going to save this for once the week ended, but since people seem to be posting about it now.
First of all, bow is relatively easy to farm and every item inside the buildup is beneficial to an int.
On top of only requiring 4k gold, the build up consists of 500/500/500 (Lunarite), 450/500/150 (Yagokoro Doll), 400 (Fruit Knife), 1000 (Lunar Landing Rocket Manual).
In other words, it's an extremely easy buildup.
But most people aren't complaining about that, so let's move on.
The nuke. It costs 120 mana to cast, which is nothing for most ints.
Assuming that an INT rushes it and gets it during the early/mid phase, they should have roughly 50 INT at that point, which means that the bow is dealing 340 damage before reduction. Most people should have around 1~1.5k HP (2k for STR) at this point, but relatively low armor. Which means that you get a nuke that should do roughly 1/4 of the enemy's damage that is spammable.
It only takes 165 total INT to reach the damage of a level 4 Gungnir. And 165 total INT is not that hard to get.
It scales rather well to the lategame, assuming that people don't get armor.
"Oh, but you can just get armor to counteract it." A problem here is that, by getting armor, you're only counteracting a single nuke. Ints don't usually rely on auto attacks and have several other nukes, so armor should be pretty useless against everything else they do.
And then, with a nuke like this, it should be hard to aim, right?
I mean, Gungnir travels slowly and has that weird hitbox and Nue's Arrow has that windup time and doesn't reach as far as Gungnir.
Well, the Lunar Bow's nuke has neither of these things.
The arrow travels quickly, is fairly wide, hits multiple units, and has no windup time.
In other words, the only thing that should be giving you trouble with aiming the bow is the fact that it's an item and therefore its hotkey is far away from the rest of your skills. (Unless you use third party programs to remap your keys)
So, uh, yeah. I dislike the bow.
The question is, though, is the bow as stupid as the only other item to get banned? (Camera)
I think that, at this point, it's borderline leaning towards yes.
It's definitely up there among the stupid items, and I would definitely like to see it nerfed. Perhaps the INT modifier could be reduced to something like 2.50x?