Request: Modified MultiUser for single MyPlex

While I get the general idea behind the MultiUser/myplex intergration I'm not sure it works in my case

 

I've got a 7 year old son.   We use the same Roku box, which is a bit difficult to change the myplex login info on

 

My son and I both enjoy the Batman Beyond show, however I'm watching it in order while he skips around to ones who's thumbnail looks interesting, thus he's made a number of the shows marked as watched for me.  Is there a recommended way for us to differentiate his shows from mine without us having to go change the myplex info every time?  If it started with an account selection each time the channel started that'd be lovely.

 

 

Early 2021 clean-up: implemented (Plex Home, managed users, fast user switching)