I think there is a future for the trains in UK but work certainly needs doing by all accounts. I'm always hearing reports about timetables not being kept to. Just to balance up the complaints a little though, here's some praise of the service.
We fly out from Gatwick 2 - 3 times a year. Rather than use our car or cadge a lift to get to the airport, we catch a train from our local station. It takes us right up to the airport terminal. So far, the train has always arrived on time and there have been no real difficulties of any sort.
The staff are usually very helpful with Mrs TW who is a wheelchair user. They always rush to get the ramps and, at the Gatwick end, escort us to (or from) the airport terminal, operating the lift or holding doors. They'd carry our cases if we let them ...but I'm an independent soul and prefer to manage myself if I possibly can.
With that sort of treatment I'm bound to say that I think our trains are pretty good. Maybe I should e-mail this post to the train company so that they can frame it.