to answer your first point.. and maybe help you with this... you dont need to move your mp3 to system/media/ringtones that would require you to make it an .obb file and its a hassle to do.. what you can do instead is make a folder in you external SD named ringtones and put whatever you want in there and the phone should recognise it..agreed and understood.
just thought of 2 other things - they may or may not be bugs (and certainly not deal-breakers):
1.) I used to be able to copy a copy ringtone (mp3 format) from my external_sd to the system/media/ringtones directory, and use that ringtone. however, when applying this ringtone on 4.4, the sound is just a blip rather than the full soundbyte.
2.) e-mail/text notification LED is white instead of green (facebook is normal at blue, and battery is normal at red) - so I'm not sure if this is intended (since the status bar icons have changed from blue to white), or if the color code was not setup properly (not really sure where to change it without using a 3rd party app). also, I would like to be able to figure out how to turn off the LED while charging - don't really need that constant notification
otherwise, thanks to your format camera fix, the ext-sd card writing fix, adding in the official kitkat boot, and adding in the accurate battery mod - I'm at good spot (so long as the battery is able to hold up).
and the LED for now best thing to do is use a 3rd party app... i thought i saw somewhere LED setting but i cant find it anymore.. hahaha nor i can find developer options in the settings hahaha.. but if you have them and you see LED in there just turn the light to black and should turn it off all together and use 3rd party apps to set LED for those you want to have an LED.