[Splatoon 3]
Nintendo has made changes to “reduc[e] attack frequency for the battle style of repeatedly firing Tenta Missiles from afar”.
Now, after firing the missiles, the special gauge will slowly drain over time and not charge again until empty. (Basically, a cooldown.)
There are significantly more buffs and nerfs to main, sub, and special weapons than what I can reasonably post on Twitter, so check the official patch notes for more: