Well, since you were asking for my realistic opinion here:
First, we need to think about what's important for a button layout.
Here is what I think is important:
- Developers of homebrew games should not have to use any additional images / etc. just for "Press XYZ Button to continue", whatever font they use.
- It's impossible to create a design that fits all of the emulated systems, so it does not need have to be based on any of them.
- Easy recognizable and memorable by any gamer (so no complex shapes, etc.)
So far, both Greek shapes and Latin characters are usable for that.
If we keep Latin characters, it doesn't make sense for me though to change the letters.
Why?
Well, there are a lot of homebrew games or emulators, etc. for the Pandora out already.
They all already have stuff like "Press A to run and X to Jump" included. Changing the layout with latin letters would mean that all these would have to be changed and recompiled for the Pyra... which is a lot of work and I'm not sure everyone will do that.
I've seen the greek letters - and basically two different layouts:
One similar to the PSX (which doesn't make sense to me because it's no PSX) and one similar to the Pandoras layout (which sounds okay for me, as it's easy to figure out when running Pandora homebrew).
Everything else doesn't really make sense to me, but maybe someone can explain to me why exactly we need to change our current layout...?
It doesn't help with emulators, but it makes things a lot more confusing for existing Pandora programs and homebrew.
So my idea is:
Either keep the current layout (and add something new like I and II for the two new buttons (like PC Engine)) or use the greek one which is similar to our current one.
However, that would probably still be a bit annoying for devs... if I'd be coding a game, I would need to look up how to type greek letters on my keyboard.