It would be great if there was a way to enable an option where you could ensure all newly created containers and buttons had a default global style enabled.
For me, global styles are to avoid any repetition of defining styles and to make life easier for the client. I think for the average content creator they will forget to enable a global style or pick the wrong one.
My workaround for this is to set up local templates with the styles pre-applied. So far I’ve only done this for blocks consisting of a few elements. Perhaps I should do that for blank starter buttons/containers too, if you think global style by default will not happen / isn’t needed. It really comes down to whether I should tell clients to use the blank blocks or always use the local templates.