KCNC has been calling itself "CBS 4" since 2003 (and switched from "News 4" to "CBS 4 News" in 2005), so it's not that big a leap. It wouldn't be the first time they had to adapt to a longstanding part of their identity being dropped (they had to drop the KOA calls because GE let Belo keep them for the radio station).
But I do think trying to force the major affiliate groups to drop, in some cases, decades' worth of brand recognition and give up at least the appearance of an autonomous newsroom potentially problematic. There are a lot of people who are still, almost 20 years later, distrustful towards CBS News (rightly or not) over their handling of the Killian documents. Plus if CBS News gets into hot water again, why make it harder to distance yourself from the network? The O&Os have every reason to align themselves with the network, being owned by them and aggressively branded with the Eyemark and "CBS" visually or verbally. But if your newsroom is independent from the network, why act like it's not? Wasn't the longstanding "A CBS AFFILIATE" marker meant to indicate exactly that?
Also, it sounds eerily similar to NBC's failed gambit to make Young sell KRON to them at a loss. "Call yourself 'NBC 4' and pay us $10 million a year or we're pulling our affiliation."
The alignment of the O&Os with the network also serves another purpose I haven't seen theorized: It helps CBS News look like it's "in touch" with large swathes of the country. Over the last decade or so, the national news media seems to have retrenched into a handful of large metropolitan strongholds: New York, LA, San Francisco, Washington, maybe Chicago. Touting a presence in places like Detroit or Pittsburgh or Baltimore or Denver is huge, especially considering the national media's disinvestment in the Rust Belt and general ignorance of the Intermountain West.