FWIW, Olympus is out of the game, having sold off their camera division, and as far as I know the company that bought it isn’t doing much in the way of innovation.
With the canon glass you have, assuming it’s higher quality stuff, you’re probably better off with a Canon. Get something with a higher megapixel count and that 2x punch from m4/3 won’t matter when you can crop in. Get something in the 30+ MP range and you’ll be in pretty good shape for cropping.