On paper it does make sense what you're saying and I completely understand your point but by my own experiances and my friends I have to say I respectfully disagree with you bro
I've used Test Enanthate, Prop and Suspension and shot them all more frequently than most people to maintain stable hormone levels, for Enanthate I shoot EOD (yes thats right I shoot Test E EOD to cut down on volume per shot and an HRT doc on another board I frequent said there is some difference in terms of sides, I don't mind shots so I do it), for Prop I shoot ED and for Suspension I shoot 3xED. I don't think you can get much more stable than that wouldn't you agree? And with Test, in my experiance, the shorter the ester is the less water I retain, its visually very obvious and it shows up as more BF.
By far the best example is NPP vs Deca(noate), very very little water rentention with NPP but bloating like a beachball with Deca. Also keep in mind my diet does not change, I never cut, I'm extremely ecto so I've basicly been bulking since day 1 of bb'ing and my daily diet has little variation, no cardio at all either, water intake doesn't change...
I can think of a couple exceptions however, EQ vs Bold base, neither retains much water if any, same goes for Tren A vs Tren E or Masteron E vs Masteron Prop, but for Tren and Masteron I would guess the reason to be their extremely androgenic nature, probably not so much for the EQ though?... I can't explain it, just my own experiance leads me to believe shorter esters retain less water with some gear.