The Thorn/TLW/Felwinters meta is why you didn't see Mida as much year one(not that the gun was bad, you could actually wreck thorn at range with it just everyone was using the big 3). People will gravitate torwards what is perceived as the best gun. That doesn't mean that gun is overpowered. Thorn/TLW were the exception though. Thorn brought with it an annoying playstyle(land 2 shots and hide) while TLW had the ADS glitch.