I think you're right, but you know, this is the internet, and many people don't really question or analyze themselves on their ways of thinking and processing things, psychologically speaking, so it's better to let them go. On the other side, some bloggers did enjoy the song, ans one of them said it was better than the previous ending.
I personally grew up with the original DB, and
this song, which is completely idol cutesy stuff, is liked by the fans and it brings a lot of memories.
I've also asked some friends that like anime about the song, and they didn't thought about it too much, they said it was ''okay'', maybe a tad slow, but still, a nice, soothing song. They also said that people shouldn't be complaining about the opening or ending themes for a remake show
I also agree with them, the song may be slow and happy-happy, but still fitting for an ending theme.