Yea I've been through the 10 man which is actually a bit harder that the 25 man version and there many several fights that I don't think you would be able to box due to intensive movement or need for multi-tanks. I'll give ya and idea of which fights would be possible with the current gear level.

Heigen the unclean this would be extremely difficult but possibly do able
Noth the Plaguebringer
Possibly patchwerk if you had mad dps and 2 tanks with a ton of stamina

The rest involve too much coordination, movement between separate groups and more than 1 tank.

A lot of the kara fight mechanics are very simple compared to naxx.