I changed a very simple event where at the beginning of the scene, i set up my variables for world generation, this straight out of the wiki guide.
The only change that iv made was Declare the Variables and update the old Variable Actions for the new ones.
Nothing else… suddenly, the variables arent being recognized as declared and the events dont work.
I when trough the rest of the events to see if anything had changed and nothing…
To sanity check, i copy / pasted the old actions from a different event and put the variables how they were, suddenly not only does it work again, but the variables are actually being recognized in the diagnostics tool
To be clear, the world generation dosent work using the new Variable Actions, nothing happens, when i put back the old ones, it works again, the new events dont work with the old ones, or something along those lines.
What the actual heck? Even when playing ball this update sucks 
EDIT: I worked out what was happening, it was because i was using external events, and for some reason i thought the external event scene variables would translate to the scene i was linking the external events to.
I never had a reason to declare Scene Variables so i had no idea, i always just used the events to create them…
This is gonna be such a hasstle when using multiple scenes… think ill just stick everything into globals and be done with it.
I did also learn that the new actions do not work like the old ones and will not make variables for you.