A nice feature would be the ability to increase/decrease spawn density of spawners using xmlfind.
Say i want to increase the spawn density on all spawners in shame by 25%. Then it would be nice to search for all Shame spawners in xmlfind, and then for example check a box for modify density, and enter the ratio i want to increase/decrease the spawn rates on them. Fore example, 1.25 to increase by 25%. Then all values for each spawn, and the total amount will be multiplied by 1.25.
This would help to finetune spawns rates or to increase density for events and other purposes. Now we have to edit every spawner manually and respawn, which can be time consuming.