Would you pay extra if you could get a better Map control in Power BI? I would, but I would have to understand how much and what exactly I am getting myself into. Looks like we are getting a new Map visual from the Azure Map team that at least on paper promises to address a bunch of existing issues in native Power BI mapping controls. It is also not clear whether this control will always be free or if it is only offered for free in preview.
As you can see, there are many questions that need to be answered but with little that we know right now, it looks promising. Let us see what the real thing looks like when it comes with the next release of Power BI Desktop.