I'm pretty sure that Aspinall knows that Jones is far, far better than anyone else he's ever fought and would gameplan accordingly, so this really is a particularly unlikely hypothetical scenario. Not quite "What if Colby one-punch KOed Aspinall in an openweight fight," but not that far off. And I say that as someone who's a Jones fan who thinks this would be a pretty even fight.
If Jones were to beat Aspinall convincingly while taking minimal damage I suspect that very few people accusing him of ducking would change their tune on that matter because it wouldn't really be relevant. I think some current Tom boosters would start saying he was never that good and either repudiate what they said before or deny that they ever said it, some would simply reevaluate and decide that they overestimated Aspinall, and some would say that anything can happen in one fight between two elite fighters and perhaps reevaluate Jones but stick to their evaluation of Aspinall. Jones haters would talk about steroids 24/7/365 until their moms kicked them out of the basement..