The latest issue of Modern Railways has some in-depth information about the rollout of 730s over the next year or so, and I figured I'd share some summarised notes as to what is planned to happen:
Diagrams on Walsall-Wolves won't increase until Cross City introduction in "spring," and then after that they'll start ramping up diagrams alongside the Chase Line runs.
Another all-day diagram is expected to start on WCML South in June, with 730/0s also deployed down there at weekends, releasing 350s for Birmingham and Trent Valley Services, which are particularly busy on Saturdays and Sundays. No /2s accepted, but they're likely to accept the first one in spring, with hopes to introduce them into passenger service in late 2024. /2s currently planned to be used on Birmingham-Liverpool as 5-car units, Euston-Crewe, and WCML South. On weekdays operation in pairs will be predominantly on WCML south at peak times, but at weekends more pairs of units will be used on Trent Valley services to accommodate leisure demand. 350/2s off lease at the end of 2024, but extensions to the lease are possible (and, let's be real, highly probable).
DfT looking into opening a new depot at Bescot (as per earlier plans), and a new toilet emptying facility has been built at Coventry North Yard.