This puzzles me. Why do people want what they see to be separated from what changes to the game are made? Surely it's more likely to be the case that people will simply want to know which of their mods overrides which other, rather than which part of which of their mod overrides which part of which other?
Can you give an example of why decoupled Install and Load orders are desirable, so I can understand? Thanks.
Plenty of reasons actually. I'll give an real world example from Oblivion:
You install the Unofficial Oblivion Patch. It comes with:
- An ESP with fixes to quests, NPC AI's, etc
- A bunch of textures, meshes, etc - fixing glitches like stretched textures (UV mapping issues), clipping, and so forth.
Normally, you'd have the Install Order of the UOP be very low (installs first), so you get its fixes, but other things like texture packs and stuff will still override it (so you still get eye candy).
You also have, say WEPON installed, which provides a bunch of fixes for weapons among other things, some of which are in the form of fixed meshes and textures. WEPON also has an ESP that changes the stats on a bunch of weapons as well. The mod does a lot more, but this is just for the example.
You want the fixes from the UOP, because you don't like some of the changes that WEPON makes to the items. However, WEPON has better fixed meshes and textures (in this example), so you want to use those. If you make Install Order and Load Order coupled, you can only choose one OR the other. Keeping them decoupled allows the data files from WEPON to load last (higher Install Order), while the plugin changes from the UOP to also load last (higher Load Order).
It doesn't happen a lot, but it is definitely something you want to be able to control.
pseudo-edit:

Is there any way to create a .bsa outside of the CK's archive function? I get an error whenever I use the archive function and therefor cannot upload my mod to the SW.
BSAopt (or DDSopt, or NIFopt). All will do some extra processing as well to help you save space, and make the BSA more efficient.
For version changes isn't it usual to put a version string in the plugin description? I though BOSS look there for that.
Yes, that's the best practice - although with a new game, we get new modders, who don't know the best practices yet
