This will be useful for me.
I am 11 nights short of Platinum after dropping down to Gold this year. So I should be able to stay for 1 night before the end of the year and reach Platinum.
To be honest, after a slow start, Accor have a fairly good job of incentivising stays with them this year.
I agree though that I have not noticed a huge amount of difference between Gold and Platinum. The free breakfast in Asia Pacific is the biggest difference.