Totally agree with you, I can't say there's ever been a time where the food at Alton or any Merlin park for that matter has been anything great. But in regards to making more revenue and getting more people to purchase food on-site, I reckon if it were possible to sub-let the outlets to restaurants with their own staff and practices it might help a bit.
It may do - I don't know enough about revenue splits in terms of the franchises being offered in the marketplace, which is crucial when you discuss revenue because it's not the revenue that counts. If you can make an extra 25% revenue in a BK vs. a Burger Kitchen but 30% of your takings disappear to the Burger King Corporation, you lose... Plus, you lose a lot more than that - control of your supply chain (which is shared between parks, hotels and midways) vanishes and freedom to adjust offerings and price according to demand is reduced, as well.
There are pros and cons when it comes to outside factors too. On the plus side, brand recognition does provide some reassurance to someone who isn't sure they want to eat at the park but it also works the opposite way around, if someone doesn't like McDonalds or has had a bad experience at another outlet and that's what you're offering, they'll likely not buy
because you are branded. Another con is of course that if people know their favourite meal at their local McDonalds is £4.99, there is often some resentment if it costs more in the park (and if it costs the same - chances are, your ability to increase revenue will be harmed)*
There is also the argument that if people are visiting Alton Towers, they want Alton Towers food because the food, music and the like affirm the park's identity.
I am not convinced that the % of guests purchasing food on site is as low as the % of enthusiasts. I've been in some pretty horrendous queues at Alton for Explorers - that place was not struggling the couple of times I went in there this season, nor were a lot of the walk up locations I passed, either.
TIt's got to be a similar model to that of recent times that various Shopping Centre's across the country are using to increase footfall in high streets. Providing more leisure in the form of high-end restaurants and other branded food outlets. (I know it's a completely different sector with different challenges)
I think that's a different argument, although there are similar themes, the fact that it's free to enter a shopping centre where you will plan to go to eat and shop vs. paying to go into a theme park for a period of time that dictates that you probably need/want to eat make it a slightly different discussion.
I never look at food options before I go to a park, I don't know how common it is that people do. The thought of carrying a picnic/bag of any kind around with me fills me with utter dread. I'll eat wherever and probably pay what they're asking for it.
* the same Subway meal costs an additional $7 inside Ceder Point as it does at the Subway at the top of the causeway.