How would I express my disappointment that Hybrid cards aren't working in Commander? I can't play Gilder Bairn in my monoblue deck even though I can in other formats. I know you don't make the rules, but where do I go?

If I was in charge of Commander, hybrid would work in the format like it works in every other format. I am not in charge though so you need to take your concerns to the Commander Committee.

Regarding the Doubling Season + Planeswalkers comment earlier, it's worth noting that this doesn't actually work. Planeswalker abilities are a cost not an effect, so DS doesn't trigger for Planeswalkers. You'd have to use Gilder Bairn or something.

It doubles the loyalty when they enter the battlefield and it doubles any tokens made.