Would we want a Lineage OS Installer?

I see what you mean, and I/other contributors will (hopefully) try to make this process very user friendly, so they won't need to panic. I guess developers could use this if they needed to install the ROM on multiple devices, though currently the installation is kind of slow. I appreciate your response!

I would suggest that such a tool should be VERY wordy about telling the user what it is doing, and should NEVER suspend its apparent activity.

My experience (and it is commercial experience, with genuine products in the marketplace) is that the user will get nervous, and may do something unfortunate, if they fear that something has gone wrong...and they WILL fear this if there is no obvious activity for a long time...and "long time" might be only a few seconds.

So, to make this tool "safe", it should be continually reassuring the user that it is doing something. There should be a progress bar, that keeps moving. There should also be a text section that keeps updating what is going on. If the operation under way will take awhile, then this text session should (every few seconds) remind the user "I'm still working on this...estimated time to completion is XX seconds" (or some such).

This operation IS dangerous, particularly if the user does something wrong. So keep reassuring the user that everything is fine.

Definitely having a LineageOS installer is a great idea!
Unquestionably, it will permit people who are not experienced with flashing custom roms(which accounts for a lot of people), nor do they have an interest in learning about that(e.g. my mom) to easily get the latest Android build on their Android phone (which may no longer be supported by the OEM; an e.g. AT&T LG G2).

Creating an installer for users who don't event know what's going on from the inside is useless IMO.
If the installer fail to flash they get stuck with a bricked device and don't know what to do.

Just FYI, I did say earlier that this installer should have an automatic NANDROID backup take place, so phones would be safe if something happened.

I added a .gitignore to reduce cloning size and keeping things clean: https://github.com/PJBeans/Lineage-OS-Installer/pull/1
If you want, add me as a collaborator on the GitHub project so I don't have to keep on making pull requests.

We will attempt to add this (or at least guide the user) later on. Thanks for your response!