I could probably make it to prime, but since we are D+ free drinks in the casino for both of us is not that important.
We have another cruise coming up in February and there is no way she will get to the Signature tier at 12,500 points. She now frequently gets offers for interior/ocean view cabins for 3-5 day cruises. She got to 2,700 points while I have 11 points (basically I used my free play in the slots until it ran out). On our last cruise we focused on my wife getting to prime.