If there are unreleased songs/unfinished demos with Ronnie's vocals on, I'd like to hear those. But definitely don't agree with them finishing the songs by adding someone else's voice.
As for Dio Disciples recording original material, yeah, fine. Probably shouldn't call it Dio Disciples though.
16/9 Richie Kotzen
25/9 Andrew O'Neill
8/10 Jex Thoth