My honest opinion on the Visenya thing is that, even if we eventually dig up conclusive evidence that she was Cool, Actually, and shout it from the rooftops loudly enough for most people of note in Westeros to hear, we still shouldn't name a daughter that. The point in the treaty wasn't about the sorcery, or the alleged kinslaying, or anything that could be proven wrong; it was about her committing indiscriminate, salt-the-earth, kingdom-wide slaughter against the Dornish. This has undeniably happened. It's just bad manners to marry a Martell and name a child after someone who did that to Dorne.
And, like, the joke was funny the first few times, but to me it has never been anything more than a joke. I am genuinely baffled by seeing any hint of sincere desire to actually name a daughter Visenya. It's like naming a child after [insert real life slaughterer on an immense, country-impacting scale] when marrying a descendant of their victims, just deeply weird.