The tiger doesn’t need to be fixed. It has a unique place in the game. It’s also one of the most powerful critters that new players can get.
I think even the Kara+tiger stuff is overblown. Okay she can bump up its stats a couple of times. To do that, she has to let it sit in her hand for how long? The card is sitting there, doing nothing. In many cases she is taking damage or relinquishing board control in exchange for not playing it.
I can’t believe people are worked up about tigers when every time I play Magmar I get multiple Makantors hitting me in the face with rush AND frenzy so they also take out 1 or more of my minions for free.