are you still willing to sign copies of Unyaro Bee Sting and Leeches?

Yes. I’ll sign any Magic card.

It seems that there are two ways to do the color pie: Either colors can't have certain things, or they can only have those things if they are really bad. You seem to favor the former, but is there room for the latter at all? I miss cards like Unyaro Bee Sting, Psionic Blast, and Gate to Phyerexia, where the color's weakness is shown by how inefficient the card is, compared to the same card in the "proper" color or by extra hoops or drawbacks. Is there room for that kind of card nowadays?

Most players are very bad at recognizing card power so it does a poor job of communicating weakness. Also, even weak versions see play keeping the color from having to look to other colors to fill in its weakness (which is a big part of why colors have weaknesses in the first place). Hornet Sting, as an example, saw tournament play.

In regards to the Maro's Wrath not exiling bees question, how are bees used to falsely break the color pie?

Unyaro Bee Sting, Bee  Sting, Hornet Sting, Unyaro Bees, and to a lessee extent, Killer Bees.

Are Bee Sting/Unyaro Bee Sting as fault like Hornet Sting, or do you go a little easier on them because they're older and from a less-defined color pie? Also: Unyaro Bees can be included. Basically, what's the deal with bees?

It’s kind of like how you go easier on kids because they don’t know better. I’ll forgive early Magic for making mistakes with the color pie, but it’s nineteen now so it’s an adult and has to be held accountable for its actions.