Well Dragon Ball Super's current arc has been made of calcified disappointment so far.
I understand why, they created the arc without any REAL plan on how to follow through and then they found out it was far too ambitious. Still sad.
I still need a new anime... Where was that list... Where was that exorcism anime...
That's kinda the thing, there's a lot of room to tell interesting stories about being stuck in MMOs, it's just that it's also a really easy shortcut for lazy self-insert trash
The most common type of Trash I see in general (not isolated to Anime... In fact books are a common source of this too) is things with great premises but that don't really want to follow up with that premise and instead use it as more of a pretense.
Take Mahouka, the greatest unintentional parody anime EVER!, it is about a society where people are split into "haves" and "Have nots" and how just one person blurring that line puts into question the entire fabric that society is based on because it suggests that perhaps things are biased towards "haves"... All with cool magic fights.
So the main character is a "Have not" who is a super genius whose magical disability means that he is better than everyone else with magic to the extent that his magical limitations (which are later removed may I add) make less sense than his abilities. Everyone loves him automatically, he is just the best, and you can immediately tell who is a villain because they have a different opinion than him or just don't like him.
The setting is a pretense to talk about the most amazing Mary Sue ever created! You might as well honestly throw out the setting.
(Mind you part of this is observer bias. A flat out bad book with a run of the mill story... won't even blip on the radar.)