Adding Cockatiels and its variants as parrots in game and Adding Ship that can operate 5-6 crewmates or joining servers

have been playing this game since Alpha Stages

If that is true. You should include away to balance out such a ship.

On paper it would be nice, but there's a problem:
The game's internal resources prevent this from happening.
What's more, if you've been playing since the beginning, you should know that the developers chose the number 4 because it's the perfect number for good crew coordination.
You forget that, but it's important.
As for taking the example of larger ships such as the BB or the Black/Pearl, for a story it might work, but look at the history:

• there have already been a lot of problems, if only with the captain ships...

You're asking too much for a game that's still limited in its internal resources, its internal engine.

As for the choice of server, that might be a good idea, but there again, I wonder whether it's feasible given that servers open and close according to their population. It's always changing. And, having used Fleet Creator, I know that there can be hundreds of servers, so can you imagine choosing a server for each connection from all those servers that open/close... It's complicated