The engines are probably one of the last things they'd ever raise. Those must weigh a pretty few tons. From a historical perspective, they have little to do directly with the disaster, very little to tell us. And if any part of the ship is in fact a gravesite, it would be the engine rooms where the engineers stayed at their posts.
The wireless room was a critical scene of action from beginning to the end of the tragedy, and nobody there.
Raising the engines was the techy side of me wishing that. I understand how the wreck is a memorial and grave for 1500 and that it should remain undisturbed. Perhaps once the hull and decks dissolves we can see the engines and boilers better.
Tim, that would be a very cool artifact to see in person. I've read somewhere the total amount of damage was only 12 square feet worth that opened to the sea. It would be cool to see the sheered off rivets and any burst seams. I've also wanted to know if Titanic grounded herself on the berg but any evidence of that may have been destroyed or worsened by impact with the ocean floor. IMO, I see no reason to not raise certain artifacts for display in a museum. It helps the memory of all those 2200 plus people continue on. I wouldn't want to see anyone trying to damage or steal from the wreck or remove personal items where bodies once were out of respect for the lost.
I wondered if this could be some kind of AC-DC converter used for electric hookups to shore. Since Titanic was made later than olympic, and that ports were in transtion from DC to AC during that period, I was wondering if they somehow had a way to convert the power to work with newer ports...