It's a single player game, so I personally would not expect any changes regarding to balance issues.
You have some valid points in my opinion regarding to the AI behavior and the diffculty curve throughout the game, however it should be playable for their targeted audiences, (I'm unsure who those are though) so if Larian Studios feels that players of age 12 and up should be able to complete the game then it all becomes more apparent as to why they chose all this.
Talent wise from a math. perspective you should allways compare the talent that you are taking versus adding 10 ability points or 2 attribute points. Making 90% of the talents fairly useless. Then ofcourse there are some talents that are just insane and others that you wouldn't take even if they happen to cost half a talent point. However those are balence issues and I will try not to stick my nose in the hornets nest, to me it's a single player game so balance issues are not a big issue and most can easily be dealt with it you really wanted to. For example, don't take the talents that you think are out of balance, don't stack resistance above a certain %... So if you really want balance, then you can do a lot get proper balance.
The co-op converation issue will be fixed in the next patch and I don't think Larian should release the "classes" of their new npc's, part of the journey is discovery. However I fear that they will mess up their new npc's since the way Jahan and Madora are build is just horrible... so if you find new npc's on higher levels it will most likely will be worse, so I personally don't expect anything from the new npc's. However there are mods out there for level 1 jahan and madora so they will also come for the next npc's so I am not that worried.
Regarding to the content, I hope/assume they will polish up the sidequests a bit here and there, however on a first playthrough without looking everything up, it's not unusual to spend 60-100 hours depending on how much you are into crafting and also depending on how many hours you are spending on inventory management.
My issues are mostly about the amount of useless loot, I feel that the balance is a bit of, I understand that not every item type has the same % of dropping but I think that in Act I on my 1st playthrough I found a dozen legendary rings/amulets and only a very few other type of legendary items. I personally don't really like to f5 f8 untill I see something else drop then a ring or amulet, so it's kinda frustrating to see bosses drop garbage 75% of the time.
With kind regards,
Rashar.
