Hey Hallboy,
Leguna's bungalow are wooden and start now to be a bit run down but it's a cheaper alternative to lumba lumba brand new bungalow. The drawback of leguna is that it's 5/10 min walk to the beach and the diveshop which could be pain in the arm with a heavy camera set up.
About day trip to Rondo and Rice island. In the past years I've been twice to Rondo, some part are heavily destroyed by dynamite fishing, some other parts are nice but nthing special compared with Pulau Weh so I think it's really worth the 1H15 min trip to get there. Abut Rice island, never dived there, but from reports of people that been there, smae story that rondo, it's not really worth the trip I think. To summarize, the diversity and density of life is so stunning at the dive sites around PUlau Weh, than you can dive there on and on for many days and see every time something new.
Usually lumba makes 2 boat dives a day, one in the morning and one inthe afternoon, if there is a big group of divers very keen, possible to organize 2 morning tanks and one aftrnoon. But anothe roption that I prefer is 2 boats dives and a beach dive before, after or in between. Beach dives are so convenient, starting 10m from the dive shop and a lot of critters for photographers, lately I spotted frog fish, sea moth, ghost pipes and the elusive mimic octopus.
Mid March viz should be good, generally speaking it's most of the time at least 15m over there and is often much more. Mantas are more or less all the time around however it's hard to predict if you'll spot some mid March on a week long stay, that's diving.