Those updates better be more fleshed out than they sound like if they want the game to still be alive come fall.
New ship types should be introduced like now, along with more options for sails, cannons, cannonballs etc. and new mechanics that makes use of them.
I'm not playing Sea of Thieves so perhaps I shouldn't bother talking about it but I was interested at one point and it's really frustrating to see a game that had a lot of potential get sunk because of pure laziness.
Consider how long Rare have been working on this game, and the kind of barebones state it released in. It would be foolish to think that those same guys (except it's probably really a smaller live team) could then turn around and fill the game with all the content it desperately needs in a much shorter time window. If all they managed in 3 years was a couple of ships, some skeletons, and half a Kraken.....what are they really gonna be able to do in a few more months?
I don't think this has much to do with laziness at all. I'd say Rare bit off more than they could chew.