I think this is so unbelievably false.
The characters that get destroyed by interactables really have no solace in other interactables to help them...because they are not power characters and can't hurl them across the screen or get guaranteed unblockable OTG setups.
I keep seeing this get said and it is completely wrong.
Multiple gadget characters have car bomb infinite loops.
Striker's Island cell block, HoJ, Ferris, (Arguably) Atlantis, and Gotham all help gadget characters. Other stages like Watchtower, Wayne Manor Batcave, and Luthor's Lab give pretty much the same advantages to all characters.
Also I know some of the gadget/acro characters can most definitely combo into interactibles, such as Batgirl, Harley, Joker, Frost, GA, etc.
On top of that BGB's play a huge roll for a good portion of the cast regardless of interactible type.
That said, acrobatic characters did get unquestionably shafted.