this isnt really like a issue but i think there should be a way to customize a spawnegg like to choose what items they have the dropchances etc basically like making a skeleton with a bow that has power 7 or something like that and u can choose the drop chances i just think it would be very cool if that would be a feature

I think this is covered by Issue #7's spawn egg suggestion.
This isn't currently a high priority, as the tab completion system in the previous update makes it easier to figure out the correct keys to do this manually. Additionally, the entity editing that should be released next update will provide NBT with all of the relevant keys, the same way /data does.

alright