I see a lot of issue taken with the tits in this manga (mostly in the previous chapter's thread), and I kinda get that.
For me, the biggest problem isn't necessarily that every girl is busty or that the boobs look weird, but rather that everyone's bodies look the exact same, just scaled up/down. No differences in areola size, nip inversion and position, fullness, perkiness/sag, or any of the other minutia that real OG oppai addicts notice and appreciate.
Now, normally that would be an insane observation to make out loud, but seeing as this is smut, and boobs are the only part of these characters' bodies the author seems to care about at all, I don't think it's unreasonable to expect that aspect to be a bit more sophisticated than it is.