I'm not optimistic about it as a service because of the politicised nature of it. As you say, all parties want to do this and that, while the public defends what is often indefensible (all while falsely assuming that if we didn't have the NHS we'd have to have the crapshoot America has).Would you agree in any part that the NHS has become a sort of golden goose for politicians, where there is always a crisis, a scandal, efficiencies to be made, new attitudes and management to implement, an organisation "to big to fail". So a never ending conveyor belt of political opportunity to talk tough upon? "Labour will save the NHS we implemented", "The tory-scum are the only party that can be trusted financially to bring the change to allow the NHS to not only survive but to thrive for the nation" etc...
Sadly, the NHS is a sort of catch all final stop for many of societies ills, fat, depressed, malnutrition, addiction, old, socially adrift, county lines, all take a turn under the nose of some Dr or medical professional of some sort or other. The slashing of community support has heaped so much more pressure just in terms of cases (ignoring the breadth of difference in cases) onto an already overburdened system.
Expectation is unrealistic, the country is on it's backside worse than it was after the bankers had a beano in 08/09. Same old situation, don't get injured or sick, the system is over run, maintain your health as best you can and hope and pray for the best.
It's already heading this way, but I can see any employer worth their salt will be offering private health insurance as an employee benefit, so you'll get those that can opting out of it entirely and avoiding the waiting lists and poor service, leaving the rest of us with whatever mess remains.