So I fail to see what "typical shonen anime" this one's following.
SAO. He's talking about SAO.
Which is ironic considering that Cari dislikes the thing. Prolly because the generic MC's abilities doesn't have any underlying explanation other than "haha I am l33t haxx0r beta gamer, fear me." Or that it introduces a lot of harem elements to the story but doesn't really fully commit to the whole thing (like, a whole posse of girls who have obvious feelings for the MC and continue to stick to him despite him being loyal to one girl? And him not doing anything about it? Really?).
Compare that to Orion who, despite seemingly following the same plot beats, actually seems to have a lot more meat in his power's backstory (which we'll likely tackle sometime in the story at some point). Also he commits to his harem instead of being wishy-washy about it (or at least, you as the player have the freedom to make him commit to it).
Further, how are you saying the writing is "damn average?" There's games with bad Engrish, bad display, and lackluster compulsion while Eternum is well known for its comedy, music that fit the mood (changed after some complaints, but I digress) and feels compelling to the point that our resident conspiracy theorist can go ham on speculation while giving us engagement.
Some people consider any work that's trope-heavy to be average writing and prefer more unique experiences. Which is fair coz Eternum doesn't do anything new on the surface level. However, while it fails at creating a unique story in its own right, it makes up for it by just being a fun experience to read (which I argue is something that makes it stand out from a lot of AVNs, most of which are themed on slice-of-life and drama stuff).