Baron just doesn't feel as intimating or powerful as it used to be or should be. Doing baron isn't chaotic or disruptive as it should be. Instead its either you have a body to tank or someone who can straight up sustain through its damage.
Some things I think it needs
* smarter AI, it should recognize the main damage threats and actively attempt to keep them away.
* wards should expire faster in the Baron pit when it is up.
* Baron is a dangerous and powerful monstrosity, it should lash out and attack those who foolishly decide to remain in its presence for too long.
* no one should be able to 100 to 0 Baron solo. Baron is a raid boss, not something one person should be capable to solo
Edit: putting here because of how good the idea sounds from comments
Having Baron capable of inflicting grievous wounds