I've recently started playing Workshop Aggro (the Shay/Detwiler/Ochoa list) and am currently working on tuning a sideboard for a completely unknown metagame I'll facing at a tournament in 2 weeks.
A friend of mine is a regular TPS player, so I was considering Mindbreak Trap or Leyline of Sanctity (with a slight preference for the latter, given that it can pull double or even triple duty vs. Oath and, if need be, Belcher).
OTOH, Grafdigger's Cage is also versatile, hosing both Dredge, Oath, Tinker and Tezzeret.
Besides these, I'm also considering at least 2 Dismember vs. Mentor and 2 Crucibles of Worlds for free wins...
Thanks for your advice!
Frobots is actually originally a deck built by Javier David called Mudhoney. He seems to call everything some variation of Mudhoney though, so it's not easy to find the first list with it all (though Eric has credited him with the list). I got my list from Brian Schlossberg, but if we're going to trace this all the way back, we all owe Javier David something.
When Espresso Stax was being developed, we tried running four Leyline of the Void in addition to two Leyline of Singularity in our sideboard in order to combat Dredge. With four Serum Powder, we were able to somewhat reliably hit Leylines against Dredge. It was a lot of hate, and, thankfully, more efficient cards were printed (most notably Grafdigger's Cage).
One of the (obvious) issues with Leyline is that it's a dead draw unless it's in your opening hand. If it isn't, it's almost always a brick (unless you have Lotus). Another consideration is that, unlike Shop Prison lists, Shop Aggro decks are punished more for their mulligans; because you are operating as the tempo deck, you need to put as much pressure on them as fast as possible, which means that if you mulligan too low, you may not hit the cards that you need in order to achieve victory in the window you've been allotted.
The combination of those two (being punished for mulling too low and not having something like Serum Powder to help smooth out your mulligans) means that I think Leylines are probably not great in Shop Aggro, though are still an option in Shop Prison (which is kind of dead at the moment).
I played on Saturday, keeping the main the same, and running a different (re: better) sideboard than I ran before:
3 Dismember
2 Tormod's Crypt
4 Grafdigger's Cage
1 Sphere of Resistance
3 Crucible of Worlds
2 Karakas
You miss out on having cards like Porcelain Legionnaire, but having the eighth Sphere is critical right now. As much as I like Mindbreak Trap and Mental Misstep as free cards (and I did spend some good money to buy German foil playsets of both), I don't think that's where I'd want to go.
I wanted more Crypt effects, but with the amount of Oath in the room, and the diversification of Oath targets, Cage seemed worthwhile.
Given the success of the Ravager Shop decks, I'd expect the metagame to adjust. Maybe this means more Ancient Grudges, or Serenity's, or whatever, but something is going to end up happening.
Good luck with the deck.