It's just fun. Looks like I have a soft spot for virtual orc decapitations. If someone's trying to convince you that Shadow of War (SoM) is different than Shadow of Mordor (SoM), they're just lying to you.
You've got the same legal cocaine gameplay, the same good sound design, the same amazing face & body motion capture, the same cute orc insults/taunts, the same 'tarded story (10x for the "Skip" button!).
Similar games I've played in the past are LotR: Return of the King (2003), Ryse: Son of Rome, Batman: Arkham Asylum/City/Origins, Mad Max, Assassin's Creed: Revelations, Middle Earth: Shadow of Mordor (lol), LotR: War in the North, the new Tomb Raiders (2013/2015), etc.

Shelob is Pollyanna McIntosh, ha-ha, up yours, Tolkien religious fanatics / 1o.

The nemesis system is awesome, and you can play single-player for hours on end after beating the main campaign. Just keep in mind the multiplayer aspect of the game is iffy, and there's a bunch of people with cheated orcs/forts.

I mean it's Shadow of Mordor but bigger. Play Shadow of Mordor before, because the story makes more sense.