1) There's a "No" button in this dialog. It allows you to opt out from detailed data sharing, and you can still use the plugin.
2) In the next plugin update, we'll make it so that the detailed data sharing prompt is shown only in EAP builds of the IDE, and detailed data sharing is never enabled in release builds.
Disclaimer: I don't have a horse in this race, and don't use Jetbrains products.
I read the dialog, and the contents is extremely clear - I can send the non-anonymized data to help improve the product, or not. It doesn't say this is a required action to use the plugin. Less is more. I prefer less text with the clear prompt to consent or not. I don't think this needs a fine print of pages long terms and conditions.