Played through the Alpha when the first version of Coop came out... great potential as we know. This is now my second coop play through on the first Beta Release. In general it's pretty buggy/glitchy still at this time, however the network code has been rock solid!
1. Biggest Coop Issue: Still having Hireling linking issues. If the person joining doesn't ask the Hireling to join, no matter what we do we cannot link the joining player to a Hireling. Have to ask them to leave party and go back to the pub and get them. Any loading of save games, back to the pub. We need to be able to freely move hirelings around at will.
2. Second Biggest Coop Issue: Still trying to follow conversations the other player starts is confusing, frustrating and makes me feel lost. Suggestion: All Dialog no matter distance etc goes into the Dialog box.
3. When both coop players are in a conversation together, what the other player chooses is hidden, you have to scroll up on the dialog to see what they said, then back down to make your choice, visibility to me it should start where they said something and scroll down from there.
4. SUGGESTION: When wanting to exit a conversation, the last choice always allows that, but that is in different places depending on all the choices available. Either add an X to click on, or have ESC or some hotkey always assigned to exit conversations.
5. SUGGESTION: Interaction with Traders. We need the ability to interact at the same time, with the same NPC when trading and not wait for one player to do their thing and then follow up afterwards. Tedious otherwise.
6. When both are trading with other NPC's, many times when one finishes first, the other player still trading bugs out and that person is now speaking and looking at the other persons trader instead of the one they started with. The Enchanter in the Market seems the most glitchy. This is a pretty big one.
7. Pyramid Teleporting in Coop. It seems only one player has the Pyramids and only their linked party teleports when using them. Please correct me if the other player can get a set to.
8. Standard teleporation in the game moves the whole team together and the whole team needs to be in the same area to teleport. But Pyramid teleporting works differently. Should it be this way? Or should it be consistent?
9. SUGGESTION: Hotkey to cycle controlled characters. Not just F1-F4 to go to each one directly, but one key that cycles around the horn each character.
10. SUGGESTION: Hotkey Mapping - Make Keyboard keys 1-0 and Numpad 1-0 unique to each other. Right now they are considered the same. I have a use for each to work independently.
11. SUGGESTION: When in combat, the ability to see the coop's player AP as they battle. Gives me a little something to monitor as they make their moves.
12. Many times NPC's are saying things around you, lately I'm seeing "Not Enough Space" as if the length of what they have to say is out of boundary to the template and the game generically shows this instead.
13. SUGGESTION: Keys you pick up that no longer needed, please have them discard automatically. Getting an inventory of keys that I don't know if they have further value or not. Or create a KEY section of the inventory. Perhaps a key-chain?
14. While trading in the upper left there are arrows to switch characters. This isn't working. I need to exit and renter NPC conversation for each character.
15. SUGGESTION: Compass Indicator in the Mini-map and Map (For example North)
16. I noticed the Rift Icon flashing green. So I decide to go see what they want. It says "Someone is in a Dialog" and we can't teleport. No one is. Comeback and tried later, keeps saying the same thing. At this point seems stuck forever.
17. SUGGESTION: Map and Quests (Say they are hot-keyed to M and Q) When I press either to enter those facilities, pressing the letter again should exit, but it does not. Many things in the game work this way but Map and Quests do not.
18. In the Murder Mystery Quest I arrest Esmeralda. When I go to visit her in the jail, if I open the jail door, she attempts escape. The guard will kill her. She drops around 30 items on the ground, mega-huge loot win!!! However it also breaks the Quest, you can never then interrogate her to move it forward.
19. SUGGESTION: Picking up a Red-Handed item that someone see's should always result in the NPC warning you and you then have an option to put it down before a fight breaks out. Many times just happens accidentally. With the Hireling linking issue, that is a reload, back the the pub and the joining player relinking their hireling.

20. -
21. SUGGESTION: Gamma adjustment needed in settings.
22. Sounds/Music goes out regularly, comes back after many times after loading into another area. Using USB headset, so software sound.