Depends on what you count as “under control” I guess? No ships have been captured or sunk since last June, so in that regard yes. On the other hand, civilian ships were still getting hit by things a couple of times a month.

Either way, though, the EU has the capacity to shoot into Yemen and isn’t doing so. I would argue that regardless of ethics, it’s not actually a helpful thing to do. The Saudis bombed Yemen for about a decade, and if that had achieved anything then we wouldn’t be in the current situation.