What are these skill changes

What are these changes to skills incredibly disappointed with the new changes,

why add cool downs?

From someone who has played poe for years and mainly loved fire skills especially channeled ones making countless flame blast and incinerate characters. It hurt's me to see what has happened to them in poe 2 incinerate is now pointless and clunky especially with the latest changes making it even clunkier and less fun to use taking mechanics it had and hiding them behind the infusion system.

Why change how ignite works making some skills like fire storm not ignite at all? why not just leave ignite how it was from poe 1 what is the point of the new flammability unless im missing something just seems like a waste of time to make things more complicated than they need to be.

Why force people to play skills a certain way limiting build diversity by making them do nothing without infusions.

It feels like the game is still being made for a select few dev's and small player base that are refusing to listen to feedback, with a lot of the changes being done just for the sake of seeming like progress is being made when game design is actually going backward.