I highly disagree with Loki being useless when shit hits the fan. If anything, a good Loki will either completely avoid shit hitting the fan, or be able to abuse his mechanics to take advantage of shit hitting the fan.
Decoy allows pretty much any aggro to completely disappear, combined also with switch tele as a very effective gap creator for only 50 energy base.
Invis is pretty much god-tier utility, and allows you to pretty much never give a fuck about anything, and farm the shit out of infested.
Switch tele, in addition to the synergy with decoy, is also pretty useful with teammates. You can get high aoe damage frames into large swarms that you may have aggrod with yourself or decoy, save teammates, or tele instantly to a defense point.
And his final move is shit, at best acceptable if you somehow manage to find a really large packed group of grineer. But lets never mention it again.
A Loki player plays smart, not tough. You rely on smart plays rather than a get out of jail free button (although Loki does have one (I love you invis))