Hello. We do appreciate your feedback and will forward it for consideration. As well, additional functionality regarding servers' selection is indeed in our roadmap, however, no ETA for now on its implementation. As of slow interface, it would be best if you'd drop a line to our customers' support team, for them to check whether any other extension or service ain't interfering our Proxy Extension's functionality. You may reach our team out at support.nordvpn.com.