I have…peculiar tastes, so I have a bit of insight into how these sorts of things are usually received. This is how I usually try to get my pet feature implemented. I hope it helps people at Topaz too; looks like their products are not too useful to me sadly: (
Amplify- No one will fix support for some 1 in 50000 format unless it is incidental or unless you band together with other people who want it and keep it in the zeitgeist as long as possible.
Focus - Find a high profile, potentially very profitable user that wants that implemented, and give her a spotlight. Play up revenue potential. VIPs have outsized impact.
Push Back - Even if the software is otherwise useful, if your important feature falls into the obscure, perennially forgotten category, use an alternative software that does.