Lanai (like the Cathedrals) was much better than Molokini.
At Molokini, we dove early, first boat at the scene (2 others showed up within 5 mins). However there was not much activity. My snorkel shore dives at "Big Beach" were more interesting than Molokini.
So far, diving from shore, all around Maui, with a guide, is what I'll forever recommend. I drove nearly all the around both parts of Maui, and conditions are very different. Using a guide, plus shore diving, is the best combo.
Never ended up doing a night dive. My "vacation" time was only Sun-Tues, as the rest of the week was a training course, or else I would have dove more.
The "drive to Hana" all the way to the Seven Pools was not worth the drive IMHO the first 1/3 of the journey just as beautiful as the other 2/3.
I found the South part of the Island, below Kihei, like the Makena State Park, the best part.
I stayed in the West area, North of Lahaina, North of the Kaanapali parkway. Conditions on the West was very windy, red flag beaches. North part, like Paia, very windy and huge waves, perfect for surfers. The beaches all along the "Southern" part of the island, from Lahaina to Maalaea to Kihei to Wailea, the best for diving & snorkeling.