Yes. The flexibility of the modbus binding, that allows you to do things like read and write to different addresses or even different types for the same ‘thing’, comes at the cost of a quite manual configuration process.
“Too bad” I’m afraid 
You only have to do it once.
Some user prefer to configure with a xxx.things file instead of PaperUI, as you can see everything at once and assign sensible channel names.
Either/or, don’t try to mix methods.