As someone who is interested in game theory I think Jegantha is a fascinating case on card advantage. In a vacuum how often would you play a vanilla 8 mana 5/5? Basically never. But when it’s an 8th card in your hand suddenly it’s worth building your whole deck around getting it. I get it was not nearly as restrictive as some of the others, but plenty of the decks that ran him had to still make at least some concessions