GlassJaw
Hero
While I thank you for a sober evaluation of the Primeval Thule suggestion, what you're saying gives me concern.
But if what you're saying is that you can't get to the Conan d20 feeling without them, then you'd probably be better of not trying a 5e conversion.
That is basically what I'm saying. There are MANY ways to get the Conan/sword & sorcery feel, independent of mechanics.
While Conan d20 did offer the Conan/S&S style of play, it did it with a focus on brand-new mechanics. So if the goal is recreate the Conan d20 system specifically, Thule won't be useful at all because Thule has zero mechanics. Conan d20 is mechanics on steroids.
I'm not advocating for or against a Conan d20 > 5e conversion. My point is that Conan d20 is primarily about mechanics, not the setting. If you want ideas for new mechanics that could be introduced into 5e, then Conan d20 is absolutely worth looking at. But I haven't run across any 5e product yet that I would advocate using as a starting point.
I loved Conan d20 but I also have no illusions that it was a complex, rules-heavy system (and to think that Spycraft and Fantasycraft were worse *shudders*).
I'd love to see some low-magic takes on 5e - and I have ideas myself - but I haven't see anything yet, at least with regards to new mechanics. If I was to undertake a project (which I'd love to do), Conan d20 would definitely be on my list of inspiration material.