You forgot to include the trio and cast of original voices as well

But other than that, yeah I agree with you, the sequels were more or less quick money making "profit" schemes sitting in their minds. They thought very little about what made the first Balto so magical (I know its slightly biased as it's inspired by a true tale) and instead just merely repeated the similar story in WQ but hacked up. WoC seemed to have a little more thought but there was still to much wrong with it and that same feeling of having it rushed and unconsidered. If there was a 4th Balto then yeah it would be poor, the chances of them putting some effort into it would be slim to nil from what I've seen with most of Universal's sequels.
And on the day they do put some effort in, bring back the originals, write up a new story line and use some good crisp clean animating, satan will be ice skating to work -_-