I think what's really going to cause an uproar is that there is no stationary radar/motion sensor in the game. The sensor grenade is the equivalent of a flash grenade used with recon pro in MW3. (as in non-reusable, limited range, requires a direct line-of-sight [open spaces] from where it goes off, and very, very temporary)
I would argue that in doing so they removed a main reason (if not the only real reason) people felt they were forced to use stealth perks to begin with.
Common sense seems to be more uncommon. Occupy Sesame Street