There is no reason to format. If you want to do the softmod again just follow one of the guides on this site, it will overwrite what you have installed. Your syscheck looks alright to me... What apps/games are giving you problems?
If your wii came with 4.3 you wont be able to install bootmii as boot2. You can check if you run the hackmii installer, it should tell if you if its possible to install as boot2 or IOS.