I think a solution with more options would be the best thing.
I would definitely keep the 13 weeks and then I would put an option that allows you to take what you have in stacking immediately by paying a commission or a penalty.
For example, I hold BFG Tokens on Betfury, at a certain point the stBFG was born which allows you to obtain a doubled percentage of dividends but involves keeping the tokens blocked for a year, you can withdraw them earlier but with a 50% penalty... Well, something similar could be done.
Maybe 50% is exaggerated but in the end if you enjoy advantages that are difficult to find it is right to pay significant penalties in case of second thoughts.
Maybe I'm wrong, I don't know but it's my opinion; also consider that everything comes from the fact that I intend to leave everything as it is for at least another 8 years so I'm in no hurry to define issues like this even if, it is natural, the topic is very interesting and it is important to discuss these things for the good and improvement of the community.