Why I'm Letting My Summoner Sigil Expire - Thoughts from the End Game
Let me preface this by saying I have been subscribed to the sigil since its introduction, I cavalier and have completed through 6.3 as well as the labyrinth (but not the abyss).
The sigil does not scale well to end game play. For players who are beginning their MCOC journey, or even experienced players like uncollected or early cavalier, the sigil is a great way to earn additional 4 and 5* shards, units, (low level) rank up materials, and discounted mastery cores.
The issue lies in the fact that none of the above is terribly hard to find in the end game. I currently have the majority of 2, 3, and 4* champions maxed out, I also have an expansive roster of 5* champions and a decent selection of 6* champions. My main focuses in game are 6* champions (which the sigil does not offer), t4b (the sigil offers a total just over 1/4th over the course of an entire month), t2a (the sigil offers a total of just over 1/4th over the course of the entire month), t5b (sigil offers none), and t5cc (sigil offers none).
Had the featured 5* purchase limit been adjusted then maybe the sigil would hold better value in the end game for collecting new champions, but it wasn't. Had the legendary been priced reasonably (5000 3* shards or maybe up to 3000 4* shards) then maybe the sigil would hold better value, but it wasn't.
The game, as of this February 2020, needs a new progressional milestone. Uncollected has become too easy, master and below is laughable, and now even the sigil has lost its appeal. Hopefully we will be getting a new progression alongside 6.4 that will make monthly EQ and the sigil feel more worthwhile, until then I am going to retire my sigil.