Good to see our concerns are being addressed, the big thing for me (as a mod packer/server owner) is "Mod developers will be able to assign flags such as only allowing use in certain modpacks, or being completely open."
Initially to me it looks like that this is enabling mod developers to shut off their mods entirely to another launcher system (Kinda like Greg Tech and the Technic platform). Is there anything being put in place to counter act this?