Look, the bottom line is I asked should they be allowed to. I already know that they can, and do, since the thread subject concerns the last power they exercised. Game developers have too much control. And it goes without saying; I understand bug fixes are necessary. I am not implying that game developers "have no right to touch a game" after they have released it. But to dip their hand in and manipulate players to play the game they want, while they already can do this, in my (very independent opinion, it seems) they should not be able to. I realize that Nintendo needed to correct the excessive spawning, but to the extent that I see hardly anything rare now is a bit far. Not to mention, this unfairly places all players into the same box, assuming everyone experienced high spawn rates. I for one fished for hours during rainstorms and afterwards, to catch nothing but sea bass. You cannot honestly tell me that accumulating Bells is equal to New Leaf because you could obtain 400k a night in beetles by spending a mere 1k on the island tours. Another point to add is the fish spawn has already been outrageously low (95% of the time I catch sea bass or black bass). On New Leaf fishing was difficult but at the very least I could catch Red Snapper more regularly than in NH.
So the answer is yes, Nintendo currently holds all of the cards in their hand. But do we really want that? Do players really want to be at the mercy of what the game developer decides, and nod blankly, obeying their rules to play the game the way they intended? We may as well be in kindergarten because you're expected to follow all of their orders and if someone steps out of line, you and your entire class is immediately punished. (I'm referring to the lowered interest rates, of course.)