@timja has this awesome plugin/writeup to handle some of the pipeline flow ui that blueocean provided - Blue Ocean but in classic UI
And UI/UX Special Interest Group has put a lot of work into modernizing the css and javascript so we can start bringing in some javascript functionality (one of the reasons blueocean exists as a complete rewrite is jenkins used protoype.js which breaks most modern javascript). They are always looking for more help if you know anyone interested.