The strength of the per-distro pages
should be that it's a clean start, but in practice (at least for OS X), the same hacks and workarounds get copied from distro to distro, resulting in a page that's completely overwhelmed with information that mostly originated with Groovy and Hydro:
Since there's little gained from the current approach, I'd be fine to move to OS-oriented seesaw install pages. The $ROS_DISTRO JS replacement I added some time ago may help in facilitating genericized instructions in some cases.