I like the direction set in the presentation, but it would great if
you could work more on the configuration page of jobs. You can see
how important it is just browsing through all the plugins that
attempt to fix problem of changing job configurations (e.g. Job DSL
plugin).
For me it would help a lot if I would be able to collapse build
steps. The more complicated the job is the more steps there are and
it becomes harder and harder to change its flow. Smart collapsing
would allow to easily glance through the configuration and add new
step in the middle of the process. I've made a proof-of-concept of
this smart collapsing and attached it to this issue:
https://issues.jenkins-ci.org/browse/JENKINS-27484?filter=-2
Please have look and good luck :-). I know changing GUI of old
software is always hard on many levels ;-).
Regards,
Nux.