iserith
Magic Wordsmith
I'm saying a Beast Master should have a partner like that.
But it doesn't and I don't think this has any impact on the viability of the class as written. My read and experience with actually playing the class is that getting attached to the animal companion is not skillful play. It will likely die at some point, just like the character might die at some point. Unless the DM takes death off the table, this is a reality the players have to deal with. Skillful players plan accordingly. I, for example, purposefully switch up animal companions based on their utility in the given adventure.
DMs are welcome to change the class on their own, of course, if they have players that want animal companions like whatever Pokemon game you're referencing. This does not indicate to me a problem with the class, just a preference of certain players.