I have to agree with Deathbringer here. Blops 2 zombies was far too easy and exploitable. Every single map had aspects that could be exploited for making the game cruise by easily.
Tranzit- Some of the best training spots ever, I never go down on this map because it's so easy to train on. There's hardly anything to get trapped on. Plus the bank negates any challenges for points.
Die Rise- Sliq is insanely overpowered and has way too much ammo, I can solo rounds 50-55 with the Sliq, get the round's max ammo, and do it all again. Not to mention it's, again, got one of the best training spots ever IMO (the dragon room). Again the bank negates point challenges.
Mob of the Dead- Dual Blunders, upgrade them to Sweeper and VW. Cruise to Round 35 with VW, switch to Sweeper for rounds 35+. Zombie shield makes you near invinicible.
Buried- Easiest zombies map EVER. Just last night I wanted to boost some stats, so by Round 1 I had grabbed four perks, The Paralyzer, and the MKII. Then I got my free perk from the witch. ALL by round 1. Due to limited time, I only got to Round 40, but I easily could have gone until 60 given time. Paralyzer is ridiculously overpowered, with Vulturaid you can camp Jugg until Round 45 using only that, and then 45+ you just run trains to allow cool down time. The only reason I had a down was because I wanted to see if you could hold a grenade with the PHD perma perk (you can't) lol.
Origins- I thought this map was difficuly at first, but really it can be exploited as well, and I do. I can typically get my 9 perks by Round 30, and it's really not a challenge when you learn the spawns and training areas. Soldar was scary at first, but now he's just a joke. All you have to do is train him like normal and wear his health down.
Nuketown- Nothing really exploitable here, just a crappy map that could have been great.
Blops 1 zombies very seldom had these problems of maps being too easy. These "squeaker" randoms can typically get to Rounds 20-25 on Blops 2, but if you look at their Blops 1 stats it's like an average of Round 10, lol.
Overall, they tried in Blops 2 zombies, but it just didn't work out. Blops 1 will forever remain the ideal zombies mode due to the classic zombies feel of traps and surviving hordes of undead without chores to do. Kino Der Toten FTW!
I don't mean any offense here, but maybe you like Blops 2 because it's easier for you, and you weren't too great at Blops 1?