Warning: Wall of text ahead! (TL;DR version: Div2 is OK, but not super-duper great.)
Late to the party, I know, but I only recently got back to Div2 after reading many gush about it here and elsewhere. I had played Div2:ED a bit when it was released, but dropped it quite quickly, only after several hours of gameplay (did the early quests in the Broken Valley) - it just didn't grab me. The clunky combat, totally random and levelled loot, plus the rather boring start were the main culprits. So, wanting to see if the (recent) praise for Div2 was deserved, I decided to give Div2 another try (and even got DKS as I found it cheap).
This time I've gotten further and am now at the end of Maxxos' temple, but unfortunately I'm still not very impressed. Okay, I'll admit DKS has its moments, but it also unfortunately has its problems. The main weakness of Div2 is, IMO, the uneveness of its quality and balancing. Balancing is especially wonky at times and seems to fluctuate quite unpredictably. The early game is a cake walk, then after meeting Talana the difficulty takes a sudden jump. E.g. the skeletons near Lovis' tower were pretty tough and made me resort to desperate MMO-style pulling and kiting tactics. For awhile it was fun to hit and run the skellies, but the jump from slaugher gobbos without any problems to "WTFBBQ! these skellies drop me in two hits" is quite jarring and comes off as poor balancing. The difficulty evens out quite fast, however, only to jump abruptly again. E.g. around the time you get to Maxxos' Temple, the fight against the Black Ring guys in the pass and then the Dragon Slayers by the temple were big spikes in difficulty. I don't know what level you're supposed to be to fight the three Dragon Slayers, but I was around lvl 10 and the fight is so uneven it wasn't even funny. My only option was to be brave like Sir Robin and high tail it out of there and, again, pull and kite, which I'm not too fond of but had no other choice. I could've tried to level up some after escaping the fight, but I seriously doubt few levels would have made much of a difference. The main Slayer, who's name escapes me, basically one-shots you if he gets a chance and that doesn't leave you much for fighting it out against him. Had I not invested in some bow skills I would've been hosed. Totally.
This repeats inside the temple when you need to fight the Slayers looting the library. Meleeing them was 100% suicide. Their leader, again, basically one-shots you and his friends aren't pushovers either. Not much room to maneuver there either. Pulling them one or two at a time to the corridor leading to the library and shooting them to death with a bow was the only option for me (as my character is not a spell-slinger). And again, this required MMO tactics, namely pulling braindead mobs, which I really would not like to see in a single-player CRPG. Amdusias, in human form, same thing (but you can't start trading shots with him, he packs much bigger guns). Was this game only balanced for mages?! And perhaps archers. I read from in-game hints, that you can respec further down the line. Well, if I ever manage to get that far, I will surely change my character to a mage. Meleeing in this game is just ridiculous and clunky.
Do note that I wasn't expecting a "streamlined experience" and easy fights, a la most modern CRPGs, but the way the difficulty fluctuates and the way the MQ repeatedly puts you in fights you're ill prepared to win without gimmicks is a bit, eh, frustrating and I would've liked a more balanced progression through the Broken Valley. Granted, it's refreshing that a modern CRPG doesn't hold your hand, but nevertheless, the nearly constant see-sawing between "Yo-ho-ho, I'm gonna kill you with my eyes closed and hands tied behind my back" and "Charge! No, runawaayyy! Aaaieeee!*dead*" doesn't score many points in my book. I do like tough fights and I have no problem with unbeatable enemies at your current level, like e.g. in Gothics, but the Div2 way is so haphazard and uneven that it comes off as poor game design to me.
Then there's the uneveness of the story and quests. But I think I've blathered on too much already. So, I'll leave you with this. The first time I got interested in the story was when I met Talana and then Damian. It intrigued me and I was left to wonder what's really going on. Then immediately after that, I meet the most cliched mage NPC I've seen in ages, Zandalor, wearing a pointy hat with stars on it, no less! He does the time-honored mage/mentor/sage routine and I was left to wonder if the game's really worth my time afterall. Extreme highs and lows, just like with the balancing.