Except that it's a game that has been 'pay to play' a long time; what you don't get in the free membership that you did get before is character slots, ship slots, and manufacture slots. The latter part is the only thing that hurt, and that only if you are into crafting, is the manufacture slots. (the crafting system is such that you buy and use factories to do the manufacturing for you; you never pick up a shovel or a sewing needle. You do get some cargo to haul around though.). The new stuff - it sounds like a lot, but it's basically convenience things. For games that went from p2p->f2p, you get a LOT in this one.
.. and most of what is unlocked through the captain's club membership STAYS unlocked, even if you only pay for one month.
However, hard to say what the future holds.... but even at worst, it's much better than a two-week trial. 
Still, I'm not here to run ads for the damnthing, just wanted to point out a decent opportunity. Me, I'm off to sail on the sea.