I create a lot of pipelines where I specify the parameters inside the pipeline like this:

pipeline {
    agent any;
    parameters {
        string(defaultValue: 'master',
               description: 'SCM branch',
               name: 'BRANCH')
    }
    stages {
        stage("Do stuff") {
            steps {
                sh "echo blah"
            }
        }
    }
} 

It would be very handy if:

1.  There was a way to invoke the linter for a Pipeline from the classic UI and the blueocean UI.  Right now, this method is a bit clunky to use: https://jenkins.io/doc/book/pipeline/development/#linter

2.  It would be good if there was an option in the classic UI and blueocean UI to Reload or Update a pipeline.  If this option could lint the pipeline, and update the parameters from the pipeline into the job, that would be very useful.