I never tried the E70. My Roland journey started with an RA90 module. In fairness, back then I wasn’t big on styles (still not that big a fan… like using my left hand for the bender too much!) and mostly used it as a sound module for my keyboard rig and sequences.

So I can’t really give you any feedback about how well or poorly earlier Roland’s handled syncopated chord input. Never really had a problem with it once I started doing some style playing on the G800/1000.

To be quite honest, I don’t recall any review from the major magazines like Keyboard being written by anyone REALLY familiar with arrangers. Their writers tended to be regular keyboard players, and most info about features tended to be lifted straight from the ad copy. Understandable, I guess, but I seldom (never!) got the impression that they were being reviewed by someone that actually used arrangers daily.

So how much info you’ll be able to glean from old magazines about esoterica like style engine minutiae is likely to be slim..! But best of luck…