TL;DRAdd ability to download/enable/disable multiple mods as if they were one.
Why?Right now if I want to install, say, seablockI have two options:
A) Download the modpack zip archive from a shady-looking filesharing service
B) Manually find and install all the 25 needed mods. Also note that mod filenames are very different from those listed in in-game mod list menu (e.g. "bobinserters_0.15.1" is actually not "Bob's Inserters", but "Bob's Adjustable Inserters", so alphabetical sorting makes it hard to find where you'd expect).
Neither of the options is particularly pleasant.
Oh, and if you install some of the mods from the portal, that have unmet dependencies - those dependencies, again, display their short names "bobinserters" which are not searchable in mod portal, but I digress.
Now, after you've installed seablock, and gave it a try, you want to go back and play your vanilla save. But oh noes, it's now converted to bob's mods! You need to go through all of the 25 mods you have and disable all of them. And then, when you want to switch back again to seablock - enable them.
This is honestly pretty tame for vanilla/non-vanilla switching, as, luckily there's a "disable all" button. But I could imagine what havoc there would be if I had a bob-only save, bob+angel-save and a seablock save to juggle.
What?Allow mod authors (and maybe even players?) designate several mods as a "pack" that *should* go together, and can be installed/enabled/disabled with one click.
Terrible paint job of how that might look like in UI: