As posted on the RFC page I would be more in favour of the option #3.
There is no need to complexify the launch of REN 2.0; and let the team focus on what really matter (As mention competition won’t wait for REN).
The foundation is supposed to work in the best interest of the project (I might be too candide on that one - but I tend to believe that we are in the same boat). If the foundation is funded more than initially expected; it means more initiatives could be well founded - increasing the chances of success of REN overall.
I would prefer to see the bond kept at 100k REN; with / without the upper limit in the number of DN set to 10k; and no airdrop no matter if a vesting period is in place.
Anyway I’ll go with whatever choice the community decides as a whole.