I recently switched to deluge from utorrent 2.2.1 and qbittorrent. At first, deluge seemed a bit complex than those 2 but later I find deluge more user-friendly and customizable in its own way.
The one thing that I feel bothered with, there is no separate tabs for trackers. Its really a useful tool. specially to those who use public trackers regularly. Torrents available in public trackers are often needed to be checked, sorted properly specially for older torrents and a separate tracker tab can help doing it.
If this is implemented, "Tracker Status:" from Status tab and "Tracker:" from Details tab will become unnecessary as there is separate tab for trackers.
Furthermore, if you could add the web seed feature it'll be plus. [could be done as plugin]
Trackers tab could be made as plugins. but i think its something so basic it should come as default.