I think Art Bell leaves two very strong and consistent legacies:
The first is the overabundance of apostrophes'.
Secondly is the fact that he butchers people's names horribly! Malachi Martin and his own wife's name. Completely fucked up.
When I watch the Malachi Martin biography movie, I was shocked at the pronunciation and couldn't get over it for a few minutes.
Heather wasn't a legacy. She was a cumdump or a failed science experiment. No legacy unless you count a horrible choice as a legacy.