I agree with QueenoftheCastle. I just watched it and this particular episode was good. They keep in tune with the young child audience as far as content. I felt the same way growing up when Rugrats were grown up, but it turned out good :P
The reason for creating this new Dora line is to offer an alternative to moms who want their daughters to stay little girls, a little longer,
That was from that link from 1babygirl
So it seems they made this show for those moms of the original Dora watchers that are now older... so the girls could stay innocent and their little girls longer. Basically to provide a content-safe show for older girls to watch that would appeal to them. Sounds like there won't be anything a 5 yr old or even 2 yr old shouldn't watch, they just want to appeal to older girls so they make Dora older :)