The other zones need a lot of work before you consider something like this. As mentioned above, there's good reasons why the others zones are avoided. Those zones need rethought before you implement such a crude solution.

Zhayolm II is very unfriendly to pet jobs and range classes, you can't unlock some vital slots until the 5th floor and it renders those jobs practically useless.

I'd like to go back and farm some Salvage 1 items, but I refuse to touch those zones until the horrible cell system is finally nuked from orbit. They may not be the best way to farm alex, but imagine how much congestion could be relieved if those 4 zones were viable again.