According to a CBS 2 Press Release, there will be some changes to the lineups starting Monday. The changes that we've been reporting for a few weeks have been confirmed by the station: Angela Rae and Todd McDermott at 4:30 and 5:30, and Dana Tyler and Ernie Anastos at 5:00 and 6:00. But additional changes are also coming in the weather department. Janine D'Adamo and Ira Joe Fisher will "swap" positions, once again placing Ira in the mornings. The information does not make it clear as to who exactly will do the 5:00, 5:30, and 6:00 weather reports. The release also promised "increased weather coverage", with News Director Joel Cheatwood quoted as saying, "Accurate and timely weather information plays a vital role in our everyday lives. These changes will afford WCBS’s talented weather team the opportunity to deliver the most extensive and complete coverage."
As for the change to "First News @ 4:30", the website has changed most mentions of "First News @ 4:00" to the new title, including an updated image here.
(Thanks to Brian for informing me of the press release!)