I have not owned an E-27... but I know that a former member of our yc had a "late model" version with the split cockpit. This had a family resemblence to the larger Ericson cockpit layouts, with an aft "steering cockpit", a narrow divider which could incorporate a traveler (but I remember it as still being on the housetop), and the rest of the cockpit forward. As dim memory serves, this was in the last or next-to-last year of production. For marketing purposes, a steering wheel was the option du jour for even small sailboats in the late 70's, and on into the eighties. Pearson was putting wheels on their 27 and 28 footers, also. Quite silly, but sailing newbies with checkbooks liked the automotive similarity... (obviously this is only IMHO!)
On the plus side, a cockpit designed from the git-go for a wheel option usually works lots better than a retrofit that leaves the owner with the curse of a puny little wheel trapped narrowly between the seats, which is why you saw designers putting in so many T-shaped cockpits from the eighties onwards.
BTW, I used to crew occasionally on an older (tiller) E-27... great fun to sail, stable, and oodles of room inside as well. Helm was way heavy for my taste, but she went to weather with real authority...
Loren in PDX