Going by that, obers must end up with one of most overpowered EHP increases in game with their -29% received accuracy and Passive healing out of combat at vet3.
You are completely right mate. Effective Hit-Points have been discussed to completely mislead discussions. It blows up numbers with a massive effect to higher proportions making units look as if they are OP while In fact, they're not. EHP is just another way of manipulating numbers and it is very also VERY misleading. It spins and turns around the truth. Nobody uses EHP in-game either in the heat of a moment. It's so misleading that anyone could even say that every tank has an EHP from their max HP to infinity. Actually, every unit can be made look OP by misleading numbers by throwing some arbitrary EHP changes to it. I'd prefer people avoiding misleading, spinning and manipulating numbers with nonsense maths just to somehow show that a unit is OP and needs nerfs. There's also the double standard of not using the same approach on units of a different faction for some reason.
Any unit can be made looking to have OP stats if used some weird combo of their EHP EFD DPS ABM or TTK.