The old chestnuts keep coming round.
Trains out of Liverpool towards Birmingham/London are NOT particularly busy, and the Birminghams are really quiet until Stafford where the hordes get on.
Another telling factor is that often more people join/leave these trains at Crewe than continue to Liverpool.
Liverpool gets extra VT services in the peak, and they are nearly all 11-car.
The Birmingham service still has the character it started out with - a pair of Birmingham-Stafford and Crewe-Liverpool locals, joined up in the middle to save "intercity" running a separate service.
The Liverpool-Brums are very well used at pretty much all times of day from the experience of working them on a regular basis for the past few years.
In general the xx:04 off Liverpool are busier as it provides the most connections, it's a popular change even from Liverpool onto the xx:56 for Milton Keynes and London at crewe and also onto the xx:02 for Stoke and the xx:07 for Derby as well the the xx:08 down towards shrewsbury and wales. Then there are also a lot change at Wolverhampton on to the xx:41 down to Coventry, Leamington, Oxford etc etc.
The 34s out of Liverpool are generally slightly quieter as they only really provide a connection at Stafford onto the LM service to London.
intermediate stations between Crewe and Liverpool all generally have quite a bit of commuter traffic into Liverpool and also some to Crewe for Crewe itself but also towards Manchester and Birmingham and Hartford in particular generates a lot of London traffic. One market which is suprisingly quite popular considering what an awkward journey it is by rail is from Winsford and hartford towards Warrington and Preston. Weekends are pretty much all full and standing often all the way from Crewe or even Stafford to Liverpool from round 10 am to mid afternoon and out of Liverpool after around the 14:34 right through til 22:04.
Any loss of these services would be highly unpopular and particularly at weekends they desperatly need more capacity. 8-car running wouldn't require any platform extensions as all stations which don't accommodate 8 coaches (Coseley, Smethwick GB, Penkridge, Winsford, Acton Bridge and South Parkway) are all authorised for the use of the unit deselect system on the 350s.