KCNC's expansion of news as mentioned by the op actually worked out quite well as that was the same time frame I worked there. The station became very competitive towards KUSA and really defeated the notion of "Nine Country". IIRC, here was what the schedule looked like at its height. This is purely based on memory, because sadly I throw out all my TV guides from these years many, many years ago thinking they were worth nothing:
5AM-7AM: News
7AM-9AM: Today
9AM-10AM: News
10AM-11AM: Colorado Today
11AM-12PM: Leeza
12PM-1PM: News
1PM-2PM: I believe first Santa Barbara, then some syndicated fare
2PM-3PM Another World
3PM-4PM: Days of our Lives
4PM-5PM: News
5PM-6PM: News
6PM-6:30PM: NBC Nightly News
6:30PM News
And of course, news at ten. With KCNC going to CBS, they had to drop several hours of news programming as CBS Daytime has more programming hours. Eventually the 6:30 newscast was dropped, CBS Evening News moved from 6 to the traditional 5:30 slot, and the 4PM newscast was canned a couple years ago in favor of Oprah. Recently they now program the 6:30 slot with news again.
Recently here in Albuquerque both of our rival stations made some expansions themselves. KOB now airs a local show called Good Day New Mexico and airs a full hour of news between six and seven, while KOAT recently expanded their 10PM newscast to a full hour.