yes, I can reconstruct cookies from headers, but my reasoning is if I stumbled upon these several problems while implementing my first request, there will probably be more, so it's better for me at the moment to use something battle tested for a while. Otherwise I'm risking switching from my app development to improving tornadofx Rest (which isn't a bad thing, except that my app doesn't get developed :D)
PS: Just in case, since this is internet and it's easy to be misunderstood. I'm writing this not to offend in any way, just as an explanation why there won't be more feedback on this specific TFX feature.