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Dear ivanatora,
You're totally right, but I'm not quite sure that detailed comments on minor edits would have any added value.
Nevertheless, I'd be more than happy to provide you more details should you let me know to which exact edit you're referring to.

Hello. Not according to https://www.era-ewv-ferp.org/ which is responsible for all e paths. I have tried to contact eooa.gr in regards to E6 part Greece, but they never replied to my requests. It was impossible to map "section 67 maronia-petrota port" due to inaccuracies of background maps. I have mapped the whole are south-south east of Maronia (i.e. dirt roads and tracks), and based on the latest background sat images and gpx file from ERA, I have mapped the E6 part you are referring to. Yet, if there's official E6 signposts on the main tarmac road from Maronia to Petrota port, please define it on the road segment relations as "European long distance path E6 - part Greece".
I have mapped the whole E6 part Greece end to end. If you notice any other issues on areas you are familiar with, please let me know.
Are you Greek btw? Many thanks!