Here was my experience updating.
Downloaded the IOS 202 Installer 1.1 and the WiiMC Channel Installer 1.2.
Installed the IOS 202 Installer 1.1 thru the Homebrew channel. All went fine.
Went to install the WiiMC Channel Installer 1.2. next and screen went black and stayed like it. Powered wii completely down and tried WiiMC Channel Installer 1.2. again and it now let me uninstall the old one. Now I run it again and installed new one.
Tried to launch WiiMC which was still 1.4 to let it update itself but black screened every time. Downloaded WiiMC 1.0.5 (Update) and overwrote my files on USB. All booted fine.
Had a play with it for half hour and had no crashes. It also seems to load far faster than before for me and seems far more responsive. Haven’t had time to test properly and see if I’m still crashing on smb shares now and again but will test later.
First impressions look good tho. Keep up the good work.