Hi. Stayed there in November. IIRC there is no lounge. The breakfast benefit was a large and superb buffet but in a very busy restaurant. Lots of tour groups. On site dining is in the same buffet , although off the menu also available. Can eat in bar and there may have been a Japanese restaurant but we didn't go. We got a superb suite and did not use SNA. Pool area is small and there was construction going on by the water slides but I expect it should be done by now. Platinum arrival benefits were points + full breakfast + a bottle of wine + chocolates. Also valet parking was free as a Platinum.
Edit: There was a lounge space on our floor but we were informed that it was closed. We assumed permanently but I guess it may have been for renovations.