No, it's not better to reference other nodes from VEX because you not only lose dependency tracking, therefore renaming the other object would break your code but also you will not be able to jist reuse that node in other project without reediting
I'd stick with local UI and referencing parms you need
If however you really want to do that you can literally just put full path to functions like chf() and others chf(“/full/path/to/parm”)