I don't think the D:OS2 items are anything more than fun easter eggs. Look at what's actually being introduced; a lute, a dagger, a cape, a bicorn hat and a mask. They're presumably going to look like the iconic items each character they're inspired from had, and will probably have a special ability that alludes to them, but it's not like they're plot points, nor are they stuff that will inherently break the reality of the game. Based on just how loot progression in crpgs works, it's not even as though you're likely to be using them for the whole of the game. If they're overpowered items then that's a different story, but this sort of stuff is exactly what I'd expect from an enhanced edition. I'm not a fan of D:OS2 but I find myself weirdly looking forward to how they're gonna skin the lore to allude to the sources, I peronally find that sort of thing fun. Because I am a weird nerd.
All that having been said, I do have misgivings about the mask specifically because it's likely to provide the spell Disguise Self to any character who wears it, and that ties into a minor gripe I have with the game as a whole; Larian just gives too many ways to experience content regardless of class. Like giving players an amulet that lets us speak with the dead for free, which is actually just straight up better than giving a character that spell since it doesn't cost a spell slot. Same with the abundance of invisibility potions and potions of speak with animals. It ends up taking away from replayability and making class choices matter less.
