i finally made a userscript.
you can find it here https://gitlab.com/sanojjonas1/MusicBrainz/-/raw/main/userscript/sanojjonas.user.js
it creates time tables of events. and it is possible to highlight artists that you have in a collection on the schedule. at the bottom you also get links to listenbrainz to create playlists of the artist that play on the event (i create multiple because the prompt would get to big) and if you added a liked artist collection in the script, it would create a separated playlist of the liked artists aswel
i made and update to the event stuff. it now also shows cancelled stuff. so if an artist cancels or an event is cancelled you can now see it in the table. as a extra bonus if an event is rescheduled it will also become visible on the page. here is an example of a show with 2 artists that got cancelled due to covid, and got rescheduled as 2 other events. (and then in 1 of the events an added support band had to cancel (probably due to covid reason aswel))
it can also create instrument tables of bands.
it now also show a table of other bands that band member was in. (there are options to only colorize liked bands, but you can also color them all (but i think it is to much then))
i also added a history table. it should give you a chronological list of everything (that i currently could think of) that is releated to a band (i will fix this for people probably tomorrow)
here is an example of a small band where you can see how it will show you where there is missing data.
example band: Double Veterans - MusicBrainz
ever wanted to know what arist played to most and you have alot of time to spare? now you can find out. just go to an event series, wait a few !minutes! 
and you will get a list of ALL the artists that ever played on that festival. including at what events it played. this table is also visible on places & event collections.
example festival: Rock Herk - MusicBrainz
(know issues: i still need to filter/mark cancelled stuff)
it can be used to visualise everything that is entered to check if it is correct.
it will probably be expaned to add more stuff but this is it for now. if you have any questions or bugs you can just contact me via discord or here directly…