Query Designer that features within SSRS and Report Builder is problematic.
+ QD holds separate hidden querys and parameters, ie dataset properties and QD can get out of synch
+ dax studio for dax and ssms for sql are far superior tools
So lets cut QD out of the code base and solve all the headaches.
Currently as far as I know Query Desinger in Report Builder is built-in and by design.
See: Build a Query in the Relational Query Designer (Report Builder and SSRS)
'QD holds separate hidden querys and parameters, ie dataset properties and QD can get out of synch'
About QD can get out of synch, you can consider sharing more details about it like a sample.
In addition, you can create a new idea here for Query Desinger to help us improve Power BI.
It is a place for customers provide feedback about Microsoft Office products . What’s more, if a feedback is high voted there by other customers, it will be promising that Microsoft Product Team will take it into consideration when designing the next version in the future.
Community Support Team _ Yingjie Li