I think a lot of families that go for Peppa Pig World the first time, but return for the rest of the park. Even if the children are not ready for the big rides in Tornado Springs or Lost Kingdom, there is a smaller rollercoaster or play area for them to enjoy. Families can see that if they have two children and one is ready for the bigger rides, there is still plenty for the other child to do while waiting for the bigger child. And when they plan trips for next year, they remember the other areas and think that the children will be ready for that area.
Compare this to Alton Towers, you go as a young family, You have Cbeebies Land. The next step up from Cbeebies is World of David Williams, and that is hardly going to justify coming back as a family. Comparing the appearance of Cbeebies Land and Peppa Pig World, is no comparison, Peppa Pig World feels fresh and new and cared for. Compared this to Cbeebies land where effects are not working, mould is growing on the props and the area feels tired and dated. There is nothing for those under 1.4m to do in X-Sector, Dark Forest or Forbidden Valley. Even Katanga Canyon is 1.1m for all its rides.
I think all of Paultons caters for 0-12 year olds. Annabelle might want to go on bigger rides, but Storm Chaser, Flight of the Pterosaur, Cyclonator, Velociraptor and Cobra are still fun for her. This is what makes Paultons Park feel so much better values than Alton Towers, even though your paying £10 more. No matter where you are in the park (With the exception of Edge and Cobra, which will be address with the new Viking area, but there was the digger ride and seal ride a short walk away) there is something for all the family to do, so as a parent your never sat there trying to keep the little ones entertained.
So for those who are saying the park does not need another junior coaster, you are missing the point of them. They are there so everyone in the family has something to do, so everyone can go on a ride no matter where in the park you are. I hope the new Viking area sticks to the 1m height for the big coaster, but I also hope there is a junior coaster added for those who might not be ready for the big ride.
At Alton Towers, you end up in areas where there is nothing for those under 1.4m to go on, and you are thinking why did I pay so much money for them to come to the park, where there is nothing to do. You feel ripped off, have a grumpy child who does not want to sit and wait for the others on the bigger rides. Paulton's do suffer from this a little as well with Peppa Pig World, as the older children don't want to do all the kid rides, and want to do something bigger, but at least they can go on the rides (And lets be honest, it does not matter how old you are, everyone loves the dinosaur ride in Peppa Pig World). At the end of the day, you leave Alton Towers feeling like all you have done is try to keep the little ones entertained while the big ones queued two hours for a ride, and then get charged £6 to leave the place.