To actually get a .7 ttk in cqc you have to get extremely lucky.
Then I'm the luckiest bigfarger alive because it sure seems piss easy to me. I can easily beat smgs with my ntec about 50%-60% of the time, and the same person with guns switched will do it to me. The ntec has high bloom, sure, but not high enough to make it a real problem. At close enough range that an smg will perfect accuracy, the bloom won't get high enough for you to miss shots either. At just a bit farther out, the smgs misses 1 or 2 shots, raising the ttk, while bursting your ntec will give you about the same time to kill and perfect accuracy. A shotgun with cover will beat it sure, but a shotgun with cover will beat literally anything, that's the point. That same shotgun in cqc without cover is probably dead. The ntec is absolutely a viable option in cqc, and then it has full rifle range? It's ridiculous