Hmm you see it's hard for me because I have tried to stay optimistic but really... SpongeBob is a different beast compared to 2002.
I am not very good at expanding on my opinion as has been brought up recently. But basically SpongeBob, as a show, as an entity, as a character, as a voice, as everything has changed. This is natural, of course. When you have a show that has many different writers, directors, a big break in the middle and so on. It will change.
I think though at this point that whilst I don't have an interest in new SpongeBob episodes, they can still improve upon them by bringing in smart writers or adding back an element of adult humour into the show.
What I've typed out just then probably looks very simplistic but if I was a bit more enthusiastic I might put some more time into my opinion, although I would probably just be doing a repeat of what I've already said. :/