I would say that one week is far too short and even 4 weeks may be too. By staking your HIVE you gain from curation and to have a say in the witnesses. I think it is valid to have to tie the funds up for a while. The initial 2 year period was too long, but I think 13 weeks is a reasonable compromise. I am not a big investor and their attitude is like to be different to mine. I would vote to keep it as it is for now.
Giving other options to increase your vote is a good alternative.