There was an article on SC365 where a ACO/FIA technical delegate says that there's going to be caps on several development areas, and that they effectively want to phase out EOT as we know it:
https://sportscar365.com/lemans/wec/...-in-2020-regs/
I know that SC365 editors have been criticized here for taking comments out of context, but these are comments from the leading FIA/ACO tech guy.
This Racer Magazine article also hints at some of the proposed development limits:
https://racer.com/2018/06/15/2020-lm...ed-at-le-mans/
When you're tinkering with things are fuel flow/allowance and aero to try and get cars to within a certain percentage point of each other, that's not EOT in my mind, which was originally more hands off, but BOP, which is very hands on.
IMO, the ACO are adopting their take on IMSA's performance balancing techniques.