I didn't like "Magic School Bus Rides Again" because, for one, the animation wasn't good, making the characters look like different students. For two, the students have a new teacher. She is nice character, but she is not like the last teacher. This is why I didn't enjoy these new episodes.
If you have seen the original Magic School Bus, watch this to cringe. It's not that it's bad, it's just... You can't remake Magic School Bus. You just can't. (It's not even Valerie Frizzle leading the class; it's her sister, Fiona!) (And the kids look so different, Phoebe looks like a ripoff of Keesha and Arnold doesn't have wavy hair and- ugh!)
I like the new series but... the original magic school bus was amazing. I feel that nothing can change that. Also, the animation was so different that I got confused who was who. Moreover, in the original series, Mrs. Frizzle was amazing. The new teacher is not that wacky and interesting as her.