1. I use wikis as a personal or group tool. It would be easier for me to install a wiki on all my machines and my sites and to store the data on SQLite files that I could clearly identify and have under a dropbox directory and backup on USB keys.
It could only be a script option when installing a mediawiki.
2. It could be also interesting to have the LocalSettings.PHP file attached to the installation report mail.
1. At the moment Softaculous only supports MySQL for scripts installations. We will try to add other database tools in future but, we do not have any ETA for that.
2. I am not clear as to what exactly you are referring to. Can you please explain this again ?