I Just discovered a new one!
It is possible to change articulations on multiple tracks and regions in one step even if you have different articulation sets.
When you select two regions on different tracks with different articulation sets, the articulation menu in the midi editor is not accessible...
But if you open the contextual menu with right click on multiple selected notes, you can change the articulation all in once.
Now, the articulation will change according to the articulation ID number. So if your art sets are all set on the same scheme, it will choose the equivalent articulation. Babylonewaves sets for example are made on the UACC model, so Long is always ID 1, legato ID 20, Staccato ID 40 and so on.