I would say the UI is good already, and I am glad that you guys are working on improving it further, hearing the community feedback, and making changes based on users' demands. If you make it look fancy, of course, it will take time to load because of the graphics. So, there is nothing wrong even if it gets slow down while the animation is enabled.
With all the added and improved features, what better way to see how good it is in the eyes of the players than launching a review campaign? I think the site is already perfect for me, but there could be some features that other members want to see added that will make the site even better if it is done in the review campaign, review campaign has proven its effectiveness by many platforms.