A couple more ideas to improve welded assemblies :
Visibility toggle ON/OFF per individual beads, the way it is right now, you can either, show all of them, or show none at all.
If you want to show only a few welds, you need to create a model state.. this is totaly overkill and adds a layer of complexity no one wants to deal with
When promoting demoting components in an assembly, welds and their associated symbols should be able to get promoted/demoted as well instead of rebuilding the entire thing from scratch.