The retcon of these stormies visually reminds me of previous attempts to replicate classic OT aliens and characters - like Yoda, Jabba, Bib Fortuna, Nien Nunb etc - in both the prequels and TFA. Despite the attempt to exactly recreate the character, they all ended up looking off - even weird - compared to the magic they pulled off 30+ years earlier with latex and paint.
Like those aliens, the retconned RO stormies sort of feel like the attempted copy got unintentionally messed up somehow, not like there was an
intentional attempt to update the design.
A SW fan can certainly tell there's something different/off about the RO stormie overall (compared to the OT stormie,) yet the changes aren't enough to make you go "oh, they updated the design a bit."
Fortunately the filmmakers have been quite vocal about saying it was intentional.