Thanks for your two answers 
You are most likely right with the “standard” events in sync policy and i also suspected that, but i hoped it was just me overlooking something.
I did try at some point to have multiple outputs in the Lemur app and had multiple osc server BP that had the different master/slave ip’s, so in “theories” that should have worked, but didn’t. I did however give me a input into the slaves when running in the editor itself on the slave. More to test i guess.
When i did set up “key” driven commands, they worked perfectly across all instances.
The stuff i wanted to do at this time wasn’t really anything that needs to be frame accurate, although it would be good to know if it is. What i tried to get going via osc was “light globes”, color changes and stuff like this, so when the DP wants some quick add-ons(what could be bespoke before the shoot) i can have them at hand with a unified BP.
Such a fun tool
I will definitely look into the cluster events, cheers for that hint.
Thanks again, that was good food for thought.
Best
M