Here are my live comments I'm writing down as I'm listening.
Woot! Thanks for the shout-out.
Atomic vs. Planck: Yes, a 5x12 Planck would appeal to me more than a 4x12 standard Planck. More keys mean that I have more opportunity for customization. I can always not use the extra row and get a Planck-ish feel. That is why the Atomic 5x15 appeals to me so much.
Programming: You're out of luck when it comes to programming using iOS, but there are a few AVR toolchain and programmers available on Android. No promises, though, because I don't know what bootloader you are using.