Great job here with maintaining details even in the stylized form! Love seeing the fan art :D

hmmmm, maybe it's not too late...

enemies can still grant experience, you just can't gain any further levels from it.

For the first part, we'd have to dive into the logs to see what exactly happened, I can't really say based off the description, it may have been a bug, or it may have been a quest state catch-up (such as if the friend you joined was ready to turn in that quest). If you submitted an in-game bug report, we'd already have these logs to dive into.

For quest catch-up:

When you enter an area, if that area is further along in a quest line than you are, you will automatically have all main story quests up to that point completed, and be assigned the current quest state for that area.

So when your friend had a level 1 character, and teleported to you in Council Chambers, their quest log would have automatically updated to have their main quest match yours. Their main quests from the first town would be auto-completed (side-quests are not auto-completed).

I appreciate the instruction, though as a member of the dev team, I can confidently say that these two different options will be available in online play with 1.0. During Character creation in Online, you have the following options
Game mode:
- Normal
- Hardcore

Challenges:
- Solo Account Found > "This character will not be able to party with nor obtain items found by other players, but shares the same stash and materials with your other Solo Account Found characters within the same game mode and Cycle"
- Solo Character Found > "This character will not be able to party with nor obtain items found by other players. This includes items you find on other Solo Character Found (SCF) characters even if they share the same game mode and Cycle."

I am aware current online only offers one selection, Online play says "Character found" for the option, but is actually Solo Account Found. This has been corrected for 1.0, and both options are available...

I'm not quite sure what you're referring to - Quest catch-up is an intended mechanic if you skip to a later part of the campaign either by using a dungeon skip, or by teleporting to another player that's further ahead.

This is correct - loot is instanced.

Solo Character Found has been added as an option for Online play. Solo Account Found has not been removed as an option for Online Play

We don't currently have an API for skill/passive data.

When we update an affix, or a stat on an item, it affects all versions of that item. The only exception is for affixes which are removed, and not replaced with a new affix - though this isn't something we've done in some time.

Prefix

if you hit ctrl+f twice, it gives you standard ctrl+f functionality. The reason it has its own is because it doesn't actively load all replies at once, so it needs to search its database to find any matches outside of what your browser may actively have loaded.