They have the bones of all of this already.
They have occupation mode, also fleet league (capped).
Could the 2 of these not be combined somehow and on the harbor map have one harbor inserted for the fleet league winners (the 2 of them play best of 3 or something in occupation mode) and the winning fleet gets their fleet crest over the fleet league harbour.
I think it would be a good thing to have the winning fleet league fleet publically displayed in this manner as it seems completely disjointed from the game and noteriety, unless you go searching through the forums trying to find out what happened and who won. Although the new link on the forum for fleet league tournament might fix this.
O.K this was quickly thought out , but I really don't see any big issue why this could not be in place quickly (apart from them not wanting to, which seems to be the end point)
Until then, be happy with fleet league i suppost. Its a pity that the smaller fleets (who make up the majority of the game) feel there isn't much out there for them. If there was it might stop alot of fleet hopping, as even smaller fleets could participate for their own stopmping ground.
You never know, this could generate a renewed interest in nf that could reap SDE more profit. I think they should use the tools they have already in this manner instead of inventing new game modes that nobody seems interested in.