Great insightful post
@PeteA ! I won't reply line by line because we disagree on most things, but -
In terms of what they have done in the past year, that's not quite what I was driving at (but it's fair to say that the park was vastly better in 2017 than it was in 2016 - with some great special events to boot). My point is that I don't recognise the erosion in the quality of the visit in the same way that you do, I still go to Alton and have a wonderful time which is why I keep going and giving them my hard earned cash.
I very much support your strategy of not going and giving them no money - the power of the consumer is vastly underrated. If it's as bad as you claim and apathy amongst non-enthusiasts is what you suggest, attendance will nosedive and Merlin will be forced to do something about it - but I don't see that to be the case given the crowds I have encountered at the park this season. The recovery seems well underway.
As a side note, what you're doing is so much better than going every weekend, hating every second and posting about it on internet forums. That I applaud.