Many times I'm scrolling through a large page 4-5 screens long to see what happened in build and find the failure reason.

We can group those messages according to step executed and also somehow collapse or extend them. This steps can me grouped based on the configuration steps inside the job or give the ability to the plugins how to group their output. Also at the end when we chain jobs and lunch another one we can have some info of what values, variables or Artifacts are passed.