Hey there, I've played a lot of COD (since the first one on PC back in 2003). This one has some interesting mechanics as well as a different movement system, however it still plays like a call of duty.
So, if you liked BO2, you'll probably end up liking BO3.
For me, personally, I didn't quite like BO2, but I'm enjoying BO3. It still has the wonky treyarch connections and hit detection issues, but they're pretty minor this time around.
Certainly a step up from Advanced Warfare (I think I only logged in around 12 hours on that game total).