To be honest, I don’t think it’s needed to use both Albatros and Alcione in the same lineup. This is a bit complicated matter, because Naval is a bit different than tanks in terms of lineups.
The Albatros uses destroyers spawn, which means the game treats it equal to destroyers. It’s not bad for the first spawn, because you know very well where all enemies are (on their spawns). If the map is decently designed and you know it well, you can get a good start with such vessel.
But the situation changes drastically with the second spawn. There are barely any boats later in the battle and enemy ships are much closer to your spawn. With how the game is “balanced”, frigates are pretty bad against destroyers at the same BR (assuming both players have similar skill level). Currently frigates are more like: spawn, rush enemy boats positions, kill as many of them as you can, wait for the battle to end. Even if you die, spawning another frigate doesn’t make much sense.
It’s better to take something like 1 boat, 1 frigate, 1 destroyer as your lineup. In Italian tech tree you can take MC-490 as a boat, Albatros as a frigate and Impetuoso as a destroyer and you have pretty much a perfect lineup. Later in the battle spawning Impetuoso will be a much better option than another Albatros. And if you want to win, but enemies took most zones at the beginning of the battle, spawning MC-490 and capturing zones will be a very good option.
My playstyle is also different than most players. My way of playing is trying to stay alive. I play defensively, I prefer not to go into dangerous areas. I care more about the RP than anything else, because I like to progress in the game, discover new things, compare different vehicles to each other and so on. So even from that perspective alone, the Alcione will not only be useless, but I will have to spade yet another Albatros. I already played this vehicle, I already spaded it, and spading top tier vehicles is not easy. Albatros without engine modifications is a very slow vessel and because of that it’s not very enjoyable to play at the beginning. On some maps you won’t even be able to hide after spawning a stock vessel, you will just die from enemy destroyers/cruisers. Of course it’s more a problem of game balancing, but this doesn’t change the fact, spading Alcione won’t be enjoyable experience. And I already spaded almost identical vessel, the Albatros, so the experience will be the same.
I still don’t see a point of event vehicles that are not unique. Copy-pasted premiums are fine, as you get premium bonuses with them and they are spaded already. Unique event vehicles are fine (even if they only have e.g. different guns), because it’s a slightly different experience to spade them. But copy-pasted event vehicles just doesn’t make sense from my perspective. It’s just another identical vehicle to spade, that won’t even give you any bonus to RP/SL. Of course, this is just my opinion on this matter.