Hello, Piotr!
Thank you, most of your changes will be added in the next theme updates. Regarding the translations, could you create new threads in appropriate sections on the forum? THen we'll make these posts sticky.
OK, but I will do it later (in a few weeks), at the moment I'm on vacation.
Regarding our old themes - yes we have plans to recode our older themes in the future and remove the framework; (StoreFront theme will be probably on the list )
I'm glad to hear it. The idea of framework was good, but now it looks like frankenstein and it poorly fits the concept of WP.
Thank you for your work. I will be glad to help you in case of necessity.