That was super fast, thank you!
For #1, my concern is, obviously, providing a backup plan. Having backup download is 50% less useful if BWS can't switch to it automatically. Something akin to TheWizard's IEGMC mirrors (if you remember that ancient times). As for obvious reasons, these are not so obvious to me I'm afraid
For #2, I know that BWS will update itself if launched via "Update If Needed" option and will not update itself if launched via "Without Update" option. However that quoted snippet of readme made me think there might be another update at some later step of BWS logic because "when it starts a BWP install" is something user will select few steps after selecting which vbs file to launch BWS with. So, my concern is if it might so happen that even if I launch BWS with "Without Update" file something will be updated later as soon as I select "BWP install", erasing all my locally made changes to general or mod related ini files.