This Is Why I Don't Pauper

The format revolves around Blue, as one can see via this article at ChannelFireball. That is not a diverse format.

 However, there are some odd things about this article when it comes to suggestions to fix this diversity issue:

First, the author wants to ban Ponder or Preordain, but not Brainstorm. As a long time player, I know that Brainstorm is the more powerful card because it's an instant. Pauper certainly has enough shuffle effects to replicate Brainstorm's strength in Legacy and this strength hinges upon it being an Instant instead of a Sorcery: the very video the author references has LSV using Brainstorm to effectively blank an opponent's discard spells.

So why is he overlooking the most obvious problem? Because it's not on the list of top 10 spells played in Pauper.

Which is flat out baffling to me. My only explanation is that I am not familiar enough with the Pauper format to understand why that is the case.

Second is the notion of banning Gush. His problem with this is:

While the card’s power cannot be denied, banning Gush would more or less kill the Tireless Tribe Combo deck and would significantly weaken the Nivix Cyclops deck. More than that, banning Gush would leave the Monarch cards—Entourage of Trest, Palace Sentinels, and Thorn of the Black Rose—as the best way to draw cards in the format. A ban of Gush might mean taking these cards out of the pool as well.

But he doesn't say why Entorage, Palace Sentinels or Thorn (all non-blue cards) would need to be taken out. Earlier in the article he admits that creatures need to have an incredibly high rate of return because removal is so good. Why is this creature-based ability so bad? He doesn't say so there's no real evidence to support it. Having those creatures be good seems like a positive thing for the diversity of the format.

As it stands, I already play a format where Blue is the best color -even in casual Legacy, Blue rules the roost- so my motivation to play a format where that's still the case but with common cards isn't that engaging to me.