This is a list of old airship amenities that are still useful to have along with the new amenities.
Sonic/Electric/Cold/Acid/Fire Resist +30
Guild Chests
Stone of Change
Altar of Epic Rituals
Device Workstation - currently Missing from Trapsmith's Workshop and Collegium of the Twelve
Banker/Mailbox/Auctioneer/Barkeep/Navigator/Twelve Planescaller (just for convenience)
House Deneith Defender (DR 1/-, stacking natural AC +1)
House Kundarak Battlemaster Contract (+1 stacking natural AC, +5 enhancement bonus to balance/haggle)
Darguun Hobgoblin Warrior (+4 stacking saves vs. fear, +2 competence bonus damage to your physical attacks, doesn't stack with competence bonus from items (link))
House Phiarlan Entertainer (+1 morale bonus to all skills, +1 morale bonus* to DCs on enchantments/illusions that you cast)
Clan Gnashtooth Kobold Shaman (Grants a +1 Sacred bonus to saves, a +1 Profane bonus to attack rolls, and a +1 stacking bonus to Natural Armor)
And here are some of the old ones I think we can toss out for good but if I'm wrong, please correct me:
Silver Flame Priest - heard it was bugged/useless
House Jorasco Healer (Stacking bonus to incoming healing +10%) - covered by Bath House
Training Dummy Blueprints (+2 stacking attack bonus for 1 hour, persistent except death). - covered by Tactical Training Room
Scholar of the Twelve (+1 non-stacking* spell penetration, +1 non-stacking* DC on evocations/conjurations that you cast) - covered by Arcane Sanctum and Archwizard
and any of the other old amenities I did not list like the old +2 stat shrines or XP shrines I believe we can toss out as well.