virtual harvest levels(can be lower then the block if specified),custom blast resistance on spawner per entity. A way to drop modded spawners whether or not it renders anything/displays the name.

Needs to have the option custom font renderer with any rgb values per spawner

XML definitions;
https://gist.github.com/jredfox/6cedebaefce88aab2f1d80704b2d71ae

Also need custom font renderer with rgb's configurable options

Api:
ability to define the drops of a new spawner with full options like the vanilla one using a plugin api of some sort.