I have been running a rolling release distro for a couple of years now and switched from LXDE to GNOME to KDE over the years. As you can imagine over the time a lot of configuration files have been touched and lately the system has just gotten a bunch of small hiccups. GTK themes that have been configured years ago but aren't present any more/don't contain all elements. Configuration for the starting of certain daemons (ssh-askpass) that stopped working, etc... Instead of doing a full re-install (which I hate), I would much rather re-install every package on the system with their default configuration files.
So I am looking for a dpkg or apt command that overwrites whatever configuration files might be present with the configuration files from the package.
Or do you think that is a bad idea? I know that I will have to reconfigure certain things (network-manager, etc...) but I hope that it will still be much less work than a complete re-install.