Instead of going to each WPM player and editing the SEUM Agent settings and Domain Account Config Tool, these should be a WPM Global Player Settings that allows users to increase the SEUM agent settings, add change the names & passwords of the local players and set the domain service account information.
It could look something like this.

Maybe the SEUM Agent settings link would give a central GUI representation of the AgentSetings DAT file in the Windows>ProgramData>SolarWinds>SEUM>Data file and the SEUM Agent Local/Domain Config Tool would be a central GUI representation of ProgramFiles>SolarWinds>Orion>SEUM>Player application.
There could also be an option to override the default SEUM-User accounts names with a local name that an organization can use instead.
Lastly, all changes made in the WPM Global Player Settings should be replicated out to all existing players when submitted along with all new WPM player installs. And there should be a restore to default option either nested with in the WPM Global Player Settings widget window or in each of the player settings.