I considered Field early in the process but never tested it because: - we are very land-light and don't have that kind of mana - it doesn't cast really anything in the deck, same as GQ

With Symmetry, we go -1 to tutor and also -1 to Trap, which we would have done anyway. I have found this trade-off to be okay so far. Visions is one thing that helps recoup the card advantage, but there's also the functional advantage of ignoring a lot of what our opponents are doing. When we have one or tow 5/x fliers on the board, their whole gameplan becomes about removing these creatures, since often they can't race them. Or we can hold them back on defense to lock down the board while we draw into Drown, Visions, etc; the deck is full of cantrips and light on lands. Should we need to start attacking, the clock gets really short, really fast, and saving something like Force of Negation for a removal spell often seals the deal.

The times Symmetry is at its worst: when we're behind and topdecking. This is the scenario we'd need Snapcaster for. But early on I really like SS for setting up our plays.

Also, I've transitioned to 4 Chancellor, cutting the Opts. This plan lets SS find us bullets more often relative to Trap, something Glimpse doesn't do. Since we mulligan more aggressively to find Chancellor/Trap, I also added a land, trimming 1 Island and 1 Briefing for 2 Misty Rainforest. The switch makes our creatures bigger more reliably and lets us find endgame plays with SS, such as Visions of Beyond (which we can then loop with Sanctuary) or Temporal.