I don't think we need to baby customers too much, there is inherent hack risk in crypto, bitcoin is way more popular than Steem and has no such safeguards. My ideal implementation would be 4 weeks defacto but have advanced features to increase number of weeks per individual choice, however this will make the code for this HF more complex and we want to keep it light because of SMT complexity already, big risk adding complicated changes to this HF.