Super late reply but I only just read this.

For 1. in JOSM click on the double+ way with the middle mouse button, then hold ctrl, and select from the two.

This isn’t really a solution, but it’s not ‘impossible’

I think it’s more concerning, that you can’t actually make out easily where there are multiple ways, rather than the issue of selecting them. This makes data susceptible to being screwed up just because a person isn’t aware it’s there.

I think if there are 2 ways + between 2 nodes then josm needs to display the lines differently. preferably parallel lines for 2 and 3 lines for 3 or more ways.

If you select any where where there are multiply ways then josm should bring up the box that appears if you hold ctrl automatically, and only have it disappear when you click somewhere. If you click on one of the ways listed in the box it should select that.

I’m presuming nothing has been changed recently in relation to this, as I can’t currently download the latest version to check myself as the sites down.

What exactly is unfixable without scripts? Using the method I stated above, I have never had much issue untangling the ways.