We hear you, and we definitely plan to add more functionality to the new user interface. That will take time however. Sadly, keeping Adblock Plus 2.x wasn't really an option because it will stop working in Firefox 57 that will be released in a week. You can read up more on this here: https://adblockplus.org/blog/the-plan-towards-offering-adblock-plus-for-firefox-as-a-web-extension