Is there any point to keeping the ships that you've commanded while leveling, aside from nostalgic reasons? Or is it better to discharge them to make room for the max tier ships you want to try? Any thoughts on this?
There's not much point to having more than two different T5 ships, especially outside the captain track you specialized in.
I hold onto a couple of ships because I like the way i customized them, so that would fall into your nostalgia category. Recently I took one out for a little flight around ESD, only to find that one of the visual updates caused a clipping issue between the nacelles and saucer on my Heavy Cruiser. Suffice it to say I am skeptical of revisiting many of my ships now