Ok... slowly and very progressively, I'm making minor changes to caching and tweaks to improve user performance. So far... it seems the issues are being improved. Saying that... I just implemented a new database caching system tonight... so IF anything weird and wonderful occurs, please tell me via ticket ASAP and I can disable it and go back to the drawing board.
Performance is a slow, progressive, trial and error approach. Based on feedback thus far, many of the issues are fixed. Saying that, I am aware there is still room for improvement, and that is being done, but MUST be done very slowly, as databases are quite finicky when it comes to tweaking, and there really is such a thing as too far and thus causes negative performance in other areas of functioning.
If you notice anything negatively weird suddenly, please report immediately via ticket.