Berserker, I don't see many complex maps around which used the new exes, so I guess they are still an experiment. Now, your humble servitor (me) has not big knowledge about programming (I am piano teacher ) so I am a bit afraid to go testing new things without seeing them working elsewhere.
I will look closely at TPM mod which will use ERA, and if everything goes well, I will have the courage to switch as well.
   
There are no error scripts in my maps (as long as I never had any error display until the end or other reports about, not to mention hundred or tests going perfectly). Only Aleee got them, when using TE. And of course they do not exceed 30 Mb. It seems more that the length of the scripts is not allowed.

Atlantis is already finished and I spent the last 100 in-game hours to hunt every little error, variable overlapping, bugs and such. I will not release it until everything is perfect.