Subic Bay has good wreck diving with 5 to 10 metre visibility. So yes the diving is good if you are into wrecks but it doesn't have the fish life or corals with good viz that appeals to many divers. Arizonia's is not really set up for children. I would recommend the hotels in Olongapo which are only 15 minutes away and are definitely family friendly. with the same access to all of the diving in Subic Bay.
Room 25 is on the first floor and I think it is wheelchair friendly. The bathroom is large and a wheelchair can be rolled up to the shower faucet. There are also handrails in the bathroom.
I don’t use a wheelchair, so this is not from actual testing, it is just my impression of Room 25 compared to other rooms I haves stayed in at this resort.