This has a Wikipedia entry already:
Also note that there is little reference for the Greek part of the interconnector for which there was a great debate. Greece decided to create the part connecting Crete with Attica on it's own citing delays that cost Greece hundrends of millions a year because it is forced to operate diesel plants in Crete.
Also Greece also has the longest and deepest AC connection in the world under construction (2 cables connecting Peloponesse with Crete). One of the cables is already operational.
Maybe, but judging by the history page(https://en.wikipedia.org/w/index.php?title=EuroAsia_Intercon...), it was initially created by someone in the US and later edited by a diverse set of editors. So unlikely the entire page is an advertisement. If you see some specific snippets you think don't fit on Wikipedia, Be Bold and delete them (https://en.wikipedia.org/wiki/Wikipedia:Be_bold)
The article fails to address the controversy between Greece and Euroasia interconnector. The only reference I can find is that in the top image, the line connecting Attika and Crete became dashed at some time. Also Greece cited that Ariadne interconnector is a company with only 25k capital and no previous completed project.