Actually, The "Main reward" should be the most rewarding while the "Alternate reward" should be something for higher levelled/geared people. As a returning/new player, noone is able to complete the event which gives the most to someone in not TT gear. Sure, getting Hepta gems is nice, but hey there's Octa's you can get from the event as well which you can make into OP Tri or Sqs which new players would definitely find useful in catching up to the higher geared people instead of being secluded in a "Oh you're weak so you can't get the OP stuff anyway" bubble.
Even as a returning/new