As to create firmware without Root access it isn't in Wasser style

I do not remember to many request to do so lately. But as I have said before it wouldn't be a problem for me to intall non rooted firmware by default if update through recovery (update.zip) would be possible to achive super user rights.
You could patch this issue yourself by adding init.d script which will set proper display scale.
To do so. First set required screen size with default visual tool. Then run Terminal Emulator and read proper settings from /sys/class/graphics/fb0/scale file.
Now you cane make /etc/init.d script to apply proper parameter(s) on boot.
For example create file /etc/init.d/00_display_scale:
#!/system/bin/sh echo "top=95" > /sys/class/graphics/fb0/scale
i.e.: chmod 754 /etc/init.d/00_display_scale
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