to be honest I don't think there is a "conundrum" but as it is, nobody seems to go for it and actually make one

there is a thread on the cnczone that goes on and on about mix ratios and filler type and it seems to just drift past logic into an endless pissing contest

I'm sure some care and though is needed for a choice mix but like you say "It doesn't look like rocket science" and the real nack to the job in my opinion is managing to commit and deciding to crack on with making it happen (like anything else)