ADF Mapping Data Flows adds ScriptLines and Link Service parameter support

I used the following Powershell to convert my existing dataflows:

foreach ($file in Get-ChildItem -Path $Path) {
    $json = Get-Content $file.FullName | ConvertFrom-Json

    $script = $json.properties.typeProperties.script
    $script = $script -replace "\t", "     "
    $scriptLines = $script -split "\n"

    Add-Member -InputObject $json.properties.typeProperties -NotePropertyName 'scriptLines' -NotePropertyValue $scriptLines
    $json.properties.typeProperties.PSObject.Properties.Remove('script')

    $json | ConvertTo-Json -Depth 32 | Set-Content $file.FullName
}

Yes, this feature applies to new data flows only. It is not planned for Copy.

Will this come to copy data flows as well?

Really miss this feature there

#1 seems to only apply to new data flows.

Any plans on how to migrate or apply it to existing data flows?

For #1 - it does not appear that ADF will use "scriptlines" instead of "script" when using the ADF UI. Is this improvement on the roadmap? Or is it complete, but will take some time to roll out across regions?