One thing I love about Planar Chaos is how it took olde breaks and bends and put it in a color that made more sense, like Prodigal Pyromancer

Some of the color pie tweaking was us trying things out we thought might work.

Are there any colorshifted cards from Planar Chaos that still fit the color pie well?

Yes, there are a bunch. Prodigal Pyromancer is the first one to pop to mind.

I'm a newer player relatively speaking, so I was wondering if there was anything from Planar Chaos that "stuck around" in later designs? (By that, I mean something that was decided "worked" in its new colour.)

There were some color shifts that stuck like Prodigal Pyromancer.

But is Prodigal Pyromancer in green now?

Nope. One-sided fight is a spell thing only.

You seem to focus a lot on the negatives of what planar chaos wrought on the game, could you talk about the genuinely good things that came out of it?

We tried a few experiments of where we could change the color pie and a few of those changes worked out like Prodigal Pyromancer.

Do you think you could do a Planar Chaos esque run of old cards color shifted, where they were our of pie before to a more correct color? (The way prodigal Pyromancer was)

I’m not sure there’s enough cards that would both fit and be ones we’d want to make to fill up a whole set.

Green deals with creatures by using other creatures. So, why is Prodigal Pyromancer / Crossbow Infantry's ability not seen often in Green?

When I say Green uses its creatures, I mean they get in and fight. They don’t sit back from afar.

Was it a mistake to include cards like prodigal pyromancer in planar chaos, since it seems to imply that some color shifts could become a reality? If you had to keep the color shifts, but could remove pyromancer from that set and put it in a different one, would you?

We also used Planar Chaos as a chance for us to try some things out we were thinking of doing. That part was probably the best thing about Planar Chaos as we learned a bunch of things we could do. But yes, that did help the confusion issue.

On Prodigal Pyromancer: "It’s New World Order issue is it massively complicates combat math." I get the repeatable kill issue, but considering the amount of combat tricks in recent sets (a seemingly vast increase, perhaps to supplement fewer kill spells), your combat maths argument makes no sense. I've never had more difficulty with combat maths than in BNG, what with counting potential heroic triggers, all the combat tricks, remembering the bonuses from inspired...

Theros has things that are influenced by single shot spells but that is much less board complicating than a permanent that sits in play and affects every combat. Remember that only the more experienced player anticipates spells played from the hand when making on board decisions. The less experienced player just looks at what knowledge is public. This is how lenticular design works. Theros limited is more complex for those able to see the layers of complexity but they are hidden from the more novice player. A Tim that sits on the table and deals damage every time they do combat math wrong is not lenticular. They can’t ignore it.

Which of Planar Chaos' colorshifting of cards/abilities/mechanics was a correct move (ie, moving Prodigal Sorcerer into Prodigal Pyromancer)?

The ones we went on to do. : )