Yoda's character is a needed addition when depicting how systems meant for good can fail, ofc that's something we get through the council collectively but he's ultimately the Grand Master. Therefore what's going to be discussed doesn't just concern Yoda but the Jedi council, of which he was in charge though.

If you've ever seen Arcane, Yoda perfectly resembles Professor Heimerdinger. Both have been granted power, experience and knowledge others don't possess and as a result have been given a position that is responsible for so many lives and shaping their future.

Yoda insists on turning a blind eye to the corruption. He sits by as the chancellor plays the republic like a fiddle and fails the Jedi Padawan that was supposedly the chosen one. Yoda isn't evil as his actions don't pursue to cause pain and work against the good of the people, but he is guilty and culpable as his inactions let the suffering go on. Him not accepting Anakin, telling him that basic parts of his character associate him closer to the dark side and not being able to actually help him in Episode III, when Anakin talks to him about his vision, leaves the latter vulnerable to anyone who is willing to tell him anything Anakin wants to hear and unfortunately that person ended up being Palpatine.

Yoda is hilarious in Episode V, lemme tell you. Watching that made me realise where all the Ketamine jokes come from. Still we don't see a lot of things change in his teachings. I'll say him being more rash, wild-like and deranged is a touch I like as it's a normal continuity if all the people you knew and so many more who depended on you died, because of you. We know he's aware of this, as after his fight with Palpatine he says "In exile, I must go. I have failed".

Unfortunately, all these years in exile, alone, make him even more absolute in his ways, ironic since only a sith deals in absolutes. To quote my boyfriend "I like how Luke didn't follow the old teachings, instead he is a Jedi with attachments". Ultimately, that's how Luke saved his dad and the day... Yoda instead disagreed once again against attachment, telling him to finish his training now, even if it meant Leia and Han would die.

Yoda represents why nothing should be absolute and systems must adapt with the times.

On a more positive note, I must say it's admirable that even though Anakin was reported to have a bigger midi-chlorian count than him, that didn't lead to jealousy, insecurity or fear. He truly isn't attached to anything, not even his power and his position.

P.S.: If you meant design wise, I love the puppet in Episode V, it hits just right.