The game was built around the campaign experience and not the multiplayer (crucible). The campaign as far as I am concerned is pretty interesting. They used the same format as Halo though: Space theme, AI to guide you, shield that protects you before you die, unique vehicles (that look like they were placed together with LEGO's), versatile weapons with specific shot bursts, etc.
The two thing I did like very much were the motion tracker. The MT design didn't exactly sow you their position, it gave you a general idea of how close they were and what direction they were coming from. The upgrade feature was nice as you could buy or scavenge items to use.
The Multiplayer was CoD with Halo/Titanfall (controls) themes masked over. You have a primary weapon, a secondary, and a power weapon to start. You only have ammo for your starting weapon however and you must scavenge for ammo for the other two. Game modes: I played control (with Fishy) and it is not much different than Domination from the Call of Duty franchise. The idea is good... but it to me the multiplayer is Bungies way of saying: Here is a Halo/CoD style game that you all wanted!
Regardless of the similarities of the games, I think it certainly has potential to be a great game.
Overall summary:
Great Campaign
Typical Multiplayer (as in nothing new)
Unique Ideas
Basically... it is not super revolutionary in my books.
If I had to give a star rating, I would say roughly 7.8/10 - 8.2/10.