@bvbellomo Just my opinion:
There are 3 basic types of fins: Blade, Split, and Freediving. Among those, you'll find blade fins in open heel and full foot. Split fins are MOSTLY open heel. Freediving fins are MOSTLY full foot.
From your self-description, I'll shortcut right to saying that I really doubt you need split fins. In my opinion, splits are primarily needed by people with weaker legs, bad knees, or whatever.
If you eliminate split fins from the menu, you are choosing between blades and freediving fins.
I have both. For warm water, recreational diving, I really like my Deep6 Eddy fins. They are about as travel-friendly as fins come. Not THE lightest, but very light and relatively short.
However, for warm water, recreational diving, I also REALLY like my Mako Competition Freediving fins. As you have already noted, but some other posters seem to be confused about, power and efficiency go together. You won't get good power out of an inefficient fin and you (generally) won't get good efficiency from a fin that does not offer good power when needed.
The Eddy fin and the Freediving fin both offer good power and efficiency, but in very different ways. Very stiff versus very long and flexible. The Eddy fin is pretty stiff (but not the stiffest fin I have tried, which is the Dive Rite XT). It gives very good fine control for precise maneuvering. The freediving fins work (for me, anyway) for all types of kicks, including frog kicks and back kicks, but the do not yield as precise control as the Deep6 fins. However, they definitely give more power. Which means I can go faster, OR I can go the same speed with less effort. Keeping up with divers who are using non-freediving fins, while using my freediving fins, is virtually effortless. I am barely moving my feet, using the minimum gas that I can, and staying right with other people.
Like you, I am going on a Bahamas liveaboard soon. I am about to purchase a new set of freediving fins, just for that trip. I have the Mako Competition Freediving fins now, but I am going to splurge for a set of the Carbon Elites. Expensive, but I expect them to be even more powerful/efficient - and I'll take all the efficiency I can get for diving single tank, open circuit. I'm a gas hog anyway, but since I switched to CCR, I am even worse on OC.
If my trip was expected to involve any swimming inside a wreck, I would take the Deep6 fins instead, for the shorter length and better maneuverability. If I were not checking a bag, I would take the Deep6 fins, for the same reason. But, I will be checking a bag and will not be going inside any wrecks, so I will take the freediving fins. I have a large gear bag and the freediving fins still do not fit inside when they are assembled. But, when I take them apart to separate the blades from the foot pockets, they fit just fine. No big deal.
The Mako fins I have now are $90.
https://www.makospearguns.com/Men-s-Competition-Freediver-II-Fins-p/mcf2f.htm
They really are great fins and you just can't beat the price. Also, they seem to run pretty true to size. I wear size 10.5 shoes and I got the size 10 - 11 fins and they fit me just right with a 2 or 3mm neoprene sock on.
Whether you go with Deep6 Eddy or Mako freediving fins, I doubt you'd be disappointed. And, of course, there are other good fins out there. The two I mentioned are definitely not your only good options. They are just the options I chose and can speak to.
And if you're on Blackbeard's at the very end of July, I will see you there!