What changes would you make ?

It's not a good comparison I'm afraid Corners. Most sites only have a few Service pitches compared with other pitches. 

We would be more likely to splash out on a serviced pitch in winter for 2 reasons.....

Pitches are less expensive in winter, so more likely to be not too far over our self imposed limit

In winter the weather is more likely to be poor, so avoiding the walk to the block is more attractive.

But some campers and other people who need facilities are already members! 

You give the appearance, whether intentional or not, of being anti campers.

The service pitches on one site we used a few Winter's ago were all empty. The taps were frozen solid. It was -11c though. Folks were managing fine, hardy types who just got on with things, others giving a bit of help to those who needed it. Pitch next to us had a fold out trailer tent on it!

CS - You used to fill your water etc. from the central filling areas before Service Pitches were introduced so presumably it didn't impinge on the enjoyment of your holiday time then but you've obviously decided to take advantage of this new system. Fair enough, you're paying for it, but I wouldn't want the club to concentrate on building too many of these pitches and ignore the more pressing need of ordinary H/S pitches (IMO)

(Actually you would fall into category c) in my list.)

But the demand is there isn't it? Also most sites have more than a few now and the number is growing steadily, Troutbeck Head has over a third SP, Bridlington a fifth, most others run between 10% to 15% and in real figures for example Melrose has 10 out of 62, so it's not a few?

And a lot of SP get booked first, yes not proving anything beyond people want them?

I usually book only a few weeks ahead but will always take a service pitch if any are still available. This is because mygirlfriend likes to shower but is absolutely terrified that the water in the caravan will run out.

That seems a reasonable arguement, except that if I'm timing things correctly there is 80 litres on line and another 40 available at the flick of a lever. She never uses anywhere near that amount of water as she is finished before the water heater can't keep up with demand, which I put at around 12 litres. 

Now I've explained this to her, and shown her the still nearly full Aquarolls after her shower, but she still says, "Well, it might run out" so a vitrually endless supply of hundreds of millions of gallons lets her shower without worry.

firstly no I don't fall into c) at all:

a) Like JayEss they guarantee a Hardstanding pitch

b) They have mobility problems and find the ease of on tap services and waste water disposal a boon

c) They don't have mobility problems but still like the reasons given above

As I go to SP sites first and then all HS site if no SP are available, that rules out a) and I don't thankfully have mobility problems so that rules out b)

Actually I have been using SP since 2001, and yes I actually found fetching and emptying water a bit of a chore and it did impinge on holiday time away before then, and so glad when I 'discovered' the club had service pitches.

I do agree with you that all HS should come first, as I said at the start of this thread, but after that more SP

Hadn't realised there were so many on some sites, I must admit. But haven't visited those sites you listed. Must be a demand if Club is investing in so many. I suppose if you are touring with a family, can't do the basic chores as well for whatever reason, or just want a total chill out stay they are a boon. 

As in all things in life, it's just best to agree with one's OH.