On Monday, after the last post, I had no lags for maybe 2h. Yesterday was fine for about 1h. I noticed that I have to turn off and on the game so it works better. Something is wrong as lags usually appear after 2h, and they're almost only when more opponents are on the screen.
I don't know about the cut scenes. Since I finished the story, there wasn't even one. Maybe they fixed it, as there were two larger updates in the last few days. Yesterday was one that took some time to download everything. I wasn't checking what they improved.
Yesterday I also finally moved to a higher difficulty level. For some reason, 1 and 2 feel the same. I moved to 3 / nightmare, and the game suddenly started to be more interesting. At 1/2, I could leave my necro, and summons were killing everything around. At 3, summons are often dying when is more pressure from monsters. There are better items and some additional events. The exp from monsters is also much higher, so I can finally see that the exp bar is moving.
Necro has one downside. When you want summons, they block 3 skill slots, so there is not much to do with 3 skills that are left, especially when one has 60 sec+ refresh.
I was a bit disappointed when I found out I can't stack +max summon amount add-ons on gear. I can add +2 to warriors and +2 to mages, so with golem, I'm at 13 summons max, and I'm not sure if I can get more. Considering there is not the best choice in higher damage aoe skills, I'm not changing anything since about 30 level, and I only slightly improve stats from time to time.