Here are some comments I offered recently to a prospective bidder for the franchise. I have now sent them to the DfT consultation as well.
I live in Christchurch, so my suggestions are mainly concerned with services on the south west main line, particularly in the Christchurch area.
Please could the trains be a bit faster? They are now slower than when the line was first electrified in 1967, in spite of the fact that todays trains have much better acceleration than those of 1967. The fastest journey from London to Christchurch (104 miles) takes as long as the fastest train from London to York (nearly 200 miles).
As well as taking some of the slack out of the schedule, the fast trains could stop less. Why does Winchester need four trains per hour, when Southampton manages with three? Why do all trains stop at Brockenhurst, when it is no longer the major junction it was pre-Beeching? In fact if the Lymington train were to run through to Southampton, hardly anyone need change there. Then the fast train could run Waterloo, Southampton(Airport and Central), Bournemouth, Poole, then maybe Wareham, Dorchester and Weymouth.
The stopping pattern of the current services make some journeys very long: for example Totton to Christchurch, Christchurch to Woking, or Christchurch to Micheldever. The up stopping train is more or less useless at Christchurch since it is soon overtaken by the following train, meaning that Christchurch effectively has one train per hour towards Southampton.
Travelling west from the Bournemouth area requires changing twice, at Southampton and Salisbury (or Upwey and Castle Cary!). How about a Southampton-Salisbury-Exeter service, and/or Weymouth-Yeovil-Exeter?
Many stations are manned only for very limited hours. As well as providing a limited advice and ticket service for most of the time, at Christchurch this means that the recently refurbished waiting room and toilets are unavailable most of the time.
The current class 444 trains are reasonably good, although the seats are a bit hard and the air conditioning a bit over-enthusiastic and noisy. But the class 450 trains are really not suitable for a long distance service. Currently the Poole stopping service is often a 444, and the fast service is sometimes a 450, especially late at night.
The line goes through two major conurbations: Eastleigh-Southampton and Bournemouth-Poole. The current services make no attempt to provide a good urban train service in these areas. Many stations have just one train per hour St Denys has two per hour one minute apart!