Any thoughts on this Sorcery Baral's Expertise?

I am not saying I see it played a lot but it can be a finisher. I can have a board you think looks reasonably safe but this can empty it. Without a backup in hand and the mana to cast it it can leave you being dead from safe. I think in the game I saw it I was at 10 life and 3 decent creatures out, 2 with flying. Then BAM, all creatures returned to hand and I think an enchant cast from the spell taking the attacker to 10. GG. Probably not reliable in a build but it does make you think more.

Thoughts on this one?

Esper control is the only deck I've played this in, but I've been impressed every time I drew it.

I've been trialing 2x Yahenni's, 1x Languish and 1x Baral's for my sweepers, trying to judge the merits of each against the others. If you can play Baral into Glimmer then the pay off is amazing, but that isn't always the case, however you'll nearly always get brilliant value for your mana out of it.

Once or twice I've missed having Languish in hand: if you fall behind (which isn't as often now thanks to Push) or you don't have an immediate answer to say a Kalitas, then Languish goes up in value. However this is more of a niche case these days and facing a wide or intimidating board is rare. I think given the current meta and abundance of vehicles I'll be switching to 2x Yahenni's and 2x Baral's. Baral's may not be a permanent answer, but more often than not it puts your opponent far enough behind to close out the game.

Nice, I visited via your deck builder link. The spell to cast as you say can be situational. I know it works in a different way but thinking of how displacement wave versus Baral's Expertise but they are different builds with DW relying on a strong follow up and it impacts both boards.

I love it in control, not tried it in flicker yet.