I have a 1Gbps fiber, and updates were taking way too much time. It wasn't a matter of my connection but Blizzard servers or too high load when I was downloading.
To reduce lag, I had to play at lower display details. I have no idea why, but this game shouldn't be so demanding, and it still lags all the time when I have higher display details. It's not low FPS; it simply gets a hiccup after a while.
Anyway, I reached 100lvl, and maybe I should read some more things before as I was sure I would be able to improve my character some more, like paragon points and other things. However, once you reach 100lvl, then there is nothing to do besides pushing yourself to pass a higher level dungeon or maybe try some pvp. There is no way to improve your character, dungeons are repeatable and boring after some time, and pvp is a joke in D4, so I'm done. The season feels like a total waste of time for me. The same ideas as in other games recently, and it's, in short, level-up a character to 100lvl and repeat. It's not really rewarding, and just like that, I passed 100lvl, and it was the end.
The community in D4 is just pathetic (but I guess most online games are not much different nowadays). All are spamming me with invites or following me to pick up drops. Invites only by low levels, so they could get something for free. Why would I party with a 5x level to do dungeons or anything else, when I have 90lvl+? Most people that I met in the last few days didn't even try to kill anything. They run on horses and clean the helltide or even regular spots for "tree rewards". I really don't play on 70lvl+ and the highest difficulty level to boost all around. As I mentioned before, all recent legion or world boss events were full of 5x-6x lvls that were just dying all the time.
I don't get lowering the difficulty. This is the highest difficulty in the game. No one makes anyone go to the top in the first week, or do the highest dungeons solo. They should check how hard are some Asian MMOs and people are not complaining, but I guess that Blizzard wants to satisfy those who pay the most.
Btw. Blizzard designers should check how a horse looks and moves. In other games like Black Desert Online, horses look much better and move much better.