Yes that is interesting. In the one sense, I don't mind that as it is helpful for getting people to understand where certain things are.
It does signify a potential to move away from themed lands again, which would be a shame. Also, it makes me wonder how often they would change the signs - every time an attraction is added (or taken away), some signs immediately become obsolete. Seems awkward in the long run compared to just pointing towards areas.
Ultimately, I don't care whether Thorpe decide to go down the themed area route or just themed attractions and no coherent themes between rides. But just stick with one and roll with it. It is frustrating seeing them seesaw between directions and ideas every couple of years.