7 Day Query Syntax

Is not possible, why do you need that? you have a 30 days chart, which includes that range.

It’s for a news based website, where week-over-week traffic comparisons are very informative.

The 7 day chart and explicit at-a-glance numeric values were convenient.

Any other solution paths?

If you really need that, you ca uninstall the current version and install the previous one from here https://downloads.www.ads-software.com/plugin/google-analytics-dashboard-for-wp.4.1.5.zip