Sorry for the late reply. Every time you post something to your ticket it gets bumped to the bottom of the queue. I wondered why an open ticket has so many replies which is why I am taking a look at this outside of the queue order :)
Yes, the allowed domain will block accessing your site if you change the domain name. This is an optional feature, useful only on some misconfigured servers. When you run the Quick Setup Wizard it's prefilled but you can of course change it e.g. completely remove its contents if you are not on an affected server.
Regarding restoration, we can't touch any component settings, not even Admin Tools. If we do we create an invisible dependency between the version of Akeeba Backup and the version of Admin Tools (or any other extension). This will be really bad if you ended up using versions of Akeeba Backup and other extensions which do not work together very well, as in “you can't ever restore your site” bad. It's best to let your site restore and need a simple manual intervention to reconfigure than breaking the entire restoration process. It's something I have explained many times the past 15 years. Given the massive changes between Admin Tools 1 and 2, 4 and 5 and 6 and 7 I can tell you it was the right way to do it.
PS: Kickstart only extracts the backup archive, it does not restore your site. It's ANGIE, the restoration script included in the backup archive at backup time, which handles your site's restoration and reconfiguration. This information is printed every time you run Kickstart.
Nicholas K. Dionysopoulos
Lead Developer and Director
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