Today, I survived 32 minutes 12 seconds in the Ancestral Lands strictly by using Spinach to RUN from map to map (not jumping) and collecting Super Old Mitochondrial DNA, Golgi Apparatus, Endoplasmic Reticulum, and Vacuoles along with goodies. Using Spinach to do this easily allows one to cover more terrain in less time and thus extend ones stay there to get more goodies.
As such, I would like to recommend the following:
1) Prohibit the ability to Levitate (Unfair to others)
2) Prohibit the use of "enhancers" such as spinach
3) Prohibit the use of Teleport locking within the "Ancestral Lands" (Unfair to others)
3) Remove the time extensions (If you don't remove the spinach use abilities)
4) Speed up the robbers (Suggested by shexycorin)
5) Reduce the drop rates, limit items, or invoke diminishing returns (Suggested by Lelu )
6) Limit entrance to once every 24 hours real-time (not game time)
7) Set a penalty for those who do NOT exit the lands before time runs out (Die perhaps?)
These lands are a great idea, but they are WAY too easy to exploit every 2 hours and in their current state. Spinach and Levitation are way too easily usable to evade robbers AND the robbers never catch up to you if you never return to the same map. So, some of the above would at least be helpful from preventing the "get rich quick" groups from going rampant.
What do you think?