The high unstaking period was originally designed to dissuade wash bettors from trying to game the original bet mining formula. With the new changes coming to bet mining, this has become less of an issue.
The current 30-days is quite long compared to most crypto projects and lowers the desire for many users that would otherwise buy and stake SX. This lowers staking participation, thereby increasing circulating supply and depressing price.
Lowering the unstaking cooldown period to 14 days will significantly increase staking capital efficiency, making it more attractive to buy and stake SX.