Pieter,.....Like you, i don't own any m4/3 camera "system", and after taking a good look I doubt I will as the annoyance level is not for me, and i suspect, not for you either. Also, on m4/3 models it's not possible to "not use" areas of feature reliably...the cameras typically have their own irritating intrusions that are not easy to eliminate permanently. Try for yourself;....go to a camera dealers and spend some time with OMD and try to set it up from scratch!....firstly you need to memorize the hundred plus page users manual, then decipher what is good for you and then finally, you have to keep those settings during use. if you succeed then good for you, but will you be able to just pick the camera up next week and still be able to use it efficiently?....Doubtful! Essentially these are amateur cameras that need coinstant use to retain familiarity and that is not usually possible for amateurs!
...When a good image turns up these are NOT the cameras to be holding...at least not for me!
The Sony camera have been criticised for their menu layout but they tend to look good compared to m4/3 and they do at least stay adjusted!