Pro Different enemies require different tactics
Bosses in this game have different immunities and different weaknesses. This is why it's important to get intel from defeated orcs: they will reveal a chieftain's vulnerabilities (for instance: takedowns, finishers, ranged attacks, fire,...).
Pro Great out-of-stealth combat
Stealth and takedowns are only the beginning. Once you're out of stealth is when the party starts. This game provides you with an out-of-stealth combat system that is very similar to Ryse: Son of Rome. That means that essentially, enemies take turns to attack you, but they can join in on the fight at any given moment. That is why you can perform parries with counters as well as combat rolls for evasion. Besides the freeflow combat, there are also additional wraith skills to make this one of the best melee combat experiences in gaming. You can tame beasts for mounted combat.
Pro Stealth & stealth combat
Shadows of Mordor features a climbing mechanic similar to Assassin's Creed games combined with stealth takedowns in the style of Far Cry 3. It all ties together very neatly and the gameplay is very smooth. Movement in this game overall is smoother than in Assassin's Creed titles. Takedowns are not your only option. You can also choose to brand enemies, which means that they will not attack you, but rather fight for you if you call upon them.