Published Connection times
I'm going to attempt to answer my own question concerning pub. min. connection times.
In digging through the online schedules flt. 79 from ABQ-PHX arrives at 6:19 am in Mar and changes to 6:21 with the apr. 6 schedule change. Before the schedule change flt. 79 can connect to the 6:45 am to DFW but after the schedule change it does not show a valid connection.
Therefore it appears minimum connecting time at PHX is 25 min. now.
AT CLT flight 3116 from DAB arrives at 2:15 in March and allows for valid connections for US Express 3180 at 2:45 to DTW and 2:50 to IND on US mainline.
Combine that with my experience that the DAB flight arrives at 1:52 after Apr. 6 but does not offer a valid connection to flt. 1509 to PHX at 2:25, it appears the pub. min. connecting time at CLT is 30 min. for US express-US express but 35 min. for US Express-US mainline.