You should definitely take the chance to check out the new Second Life Beta Viewer.

Its adding some huge improvements to the UI to not only make it feel more like the old 1.5 UI, but also making the UI extremely customizable so you can make it do exactly what you want it to do. Yes its still a Viewer 2/3 base, and YES it has mesh support. But its got pure UI customizability as well allowing you to set the viewer up EXACTLY how you want it.

Give it a shot, they can use all the feedback they can get!