HOORAY ! for the CoronaMultiMap at last !!!!
For people having trouble with new ui, well I too like tabbed Ui (Rawalanche's suggested) type more but the current one is useable too. Still, I really don't understand the problem with "LOTS" of scrolling either here -
http://clip2net.com/s/3aElWjw - is that I always do while using Corona or any other renderer or some "large-option/feature-count" plugins (like forestpack for example) - for me it's the handiest way for sure.
Simplest thing I would suggest for a new UI's improvement would be the addition of an expand/show all button - I at least would be content with just that ))
More complex one would be some sort of sticky (always visible/on top) Corona render rollout panel (or just buttons) which instead of opening new rollouts and closing current ones would just scroll the always expanded Ui down to the pressed one's rollout. I think If that is possible (and judging from my usage of right click on scroll bar it can be done some way or another) this way everyone would be happy - all new ui haters, lovers and neutrals alike ))