Ability to Edit/Combine Power BI Service Datasets

Will we ever be able to edit datasets from the Power BI Service?

The issue I'm running into:

I have a growing number of reports that are (mostly) using the same source data from the same database. I would estimate that 95% of the data in each report is the same. However, in each report, I have to make a few changes in Power Query or occasionally merge in another table. But I'm uploading the same millions of rows every day/week, with only slight modifications. 

It would be much more efficient for me to be able to load a common dataset from the Power BI Service, then make table Power Query edits and/or merge in new tables to fit the specific application. 

Is that ability anywhere on the roadmap? I need to know if I should start hacking together other solutions or just wait. Do these statements from earlier in the summer mean that we'll be able to edit Power BI Service data sometime soon?:

https://powerbi.microsoft.com/en-us/blog/power-bi-expands-self-service-prep-for-big-data-unifies-modern-and-enterprise-bi/