CMB2 Meta Split plugin updated for slicker code and an option.
The CMB2 Meta Split plugin will take care, as the name suggests, of splitting the meta the Custom Meta Boxes 2 plugin will store in the database.
To keep track of the order of things meta values, both for post and users, will be stored in a serialized array by the Custom Meta Boxes 2 plugin: that makes total sense but does not lend itself to meta queries.
In an attempt to solve that problem the plugin will “duplicate” the meta values storing a meta query usable version of each field.
The README file tells the story so have a read if that’s interesting to you.