They did. It's called the E-PL7 - a brilliant camera if you can (unlike me) live without a viewfinder. We're at the E-PL10 now, but for me, the E-PL7 was the pinnacle and had all the E-PL mojo you can think of; it also had - by some margin - the best handling of the whole series. It is, essentially, an E-M10 without a viewfinder, and, as such, a mini E-P5 (minus one control dial and some functionality, whose absence never bothered me; the I.B.I.S. is less sophisticated though).
I still consider it the best camera of that type I've ever shot with, the GR series notwithstanding (they're different in that they're still smaller and sport a bigger sensor - so they have an excuse for being fiddly). It was comfortable to hold and quick to shoot, with a much better touchscreen interface than everything else in that respect (leagues ahead of the GR III, e.g. ...). Every time I pick up the GR III to do some serious shooting (every day, this month), I wish it handled as elegantly as the E-PL7. And as the GR III handles nicely in its own way, that's saying something ...
The E-PL series is stuck with the 16MP sensor, though. I sold the GX80, E-PL7 and E-M10 for the GX9 ... I wanted that 20MP sensor, and I was right. But that doesn't take away from the fact that all three were wonderful cameras. Between the three, I used the E-PL7 the least for one single reason: no EVF. I always hoped they'd manage to add a tiny one even (like the one in the Panasonic GM5) - it'd have been good enough for me. But they decided to go the "cute route" and turned the E-PL line into a livestyle product; along the way, they killed the camera for me everyone taking photography serious, it seems. So, if you want to experience what it could have become, get an E-PL7.
Mine developed the same issue as it got older ... Still, it was such a nice camera in the hand; the I.B.I.S. was pretty useless, though. In a way, it's silly to be nostalgic about it - but it's a nice kind of sillyness, like still enjoying Chrismas cookies ...
M.