I'm confused by the confusion over the choice here. I dont agree with the name (pretty poor for a company who can afford to hire a good marketing agency!) but I am in no way surprised. People keep saying about how it is going to lower the child-friendly lineup and this is bad. I dont see whats so bad about this.
Merlin have 4 major parks in the UK: Thorpe Park, Legoland, Chessington and Alton Towers.
Legoland is mainly for kids (and people who REALLY like lego), Chessington is more aimed at the younger market - and has some very strict planning controls so cannot build the thrill rides that easy, and Alton Towers also has strict controls over building (I know you can dig down, but that costs way more). Which leaves Thorpe, which doesn't have such stringent controls over building of the rides.
From a business point of view, why wouldn't you aim to make Thorpe the Thrill park?? Makes sense to me! You have 3 others who are for family; two of which are very close. Also over the apocalyptic theming - Fright Nights is very popular (and I believe might of been one of the only times the Park sold out). Merlin is a business and has to come up with ways of getting people back and adding new things with tightening budgets (like every other business in the UK). Yes there are annual pass holders, but they are guaranteed money for Merlin (you pay for the year, might not pay anymore). They need people to buy day tickets to kick up attendance and sales. Thats why they have to do things like re-theming X to try and get more customers to walk through the door.
Due to the success of Fright Nights, the permanent mazes (I.e. dont cost in building or the extra kit/generators to run) are going to be open out side of fright nights. All they have to do is staff them rather than rebuild them or change the configuration of the walkways like during FN - and this is due to the large success of this years fright nights and the reception of the walking dead.
I would say always wait until you have ridden the ride before judging it. Merlin is a business - business pay to what makes them money.
On another note, if they are opening up more horror/scare attractions during the main season it might make for a change to fright nights (I.e. the more intense version across the park) which can stop it from becoming stale.
Just my opinion - no doubt someone will disagree but you have to look at these things objectively. If when ridden you dont like the ride, simply dont go on it. The park will see throughput fall and then force them to change their ways. The direction of Thorpe has always been all over the place, but thats probably down to the change in peoples behaviours and what works for the park. There has always been a slightly disturbing theme with most of the rides there, and I dont think its a bad thing - as where else caters for the scare/horror/adrenaline market in the UK?