Aerolopa shows that these seats have a tremendous amount of legroom. https://www.aerolopa.com/ey-388

You may have luck by searching through some YouTube videos on the Etihad A380. There may be some videos of a tour through the economy section where you can get a sense for the space in row 43.

Just a note -- you run the risk of sitting next to a crying baby in a bassinet with these seats.