One problem in the drops are the new Wave releases. People get excited about Ghost, Jumpmasters, etc. and start flying those because they just sunk money into them. Rebel players could have gone scum or imperial with the new Wave because Ghost was the only new release for rebels and didnt excite some with its pure tankiness. They want new ships to fly, so they buy a couple Scouts or TAPs and get to work. If Poe was released same time as Scouts and TAPs, his use would be just as high. People want to play with their new toys to see what they can do. Numbers are on their side.
When rebels fly Ghost, Poe naturally takes a hit because of his cost meanwhile support ships like Biggs and generic Awings increase. Im no tourney champ or anything, and mostly play casual, but Ive been flying Ghost strictly since it came out, and I havent touched Poe, but see myself running Falcon, Dash, Corran more as two ship builds, or Biggs and a Awing blocker, etc. I dont think it has much to do with Poe being ineffective, I think its new toys and what complements the new toys. If people dont fly new ships like Inquisitor in SCs and Regionals, how will they know if he is more effective than Soontir or Vader? Its a popularity contest. We could see Soontir fall when Imp Vets gets released, that doesnt mean he is less effective, its just means he is less popular. Defenders are expensive, and to take advantage of Tractor Beam, a PS9 35pt ship wont fit as well as say PS8 at 26pts or 31pts in lists.
This ranking works in a "Whats Popular Now" system, but I dont think it is a good ranking for "What is best". Its still a valuable ranking system because you can build lists around what is popular.
Just my 2 cents
If 20 players fly Scouts, 8 fly Palp Aces, and 2 fly Poe lists, the chances are that Scouts and Palps is going to advance just on numbers alone. If out of 20 scouts, only 5 made top 8, only 2 Palps made top 8, and 1 Poe made top 8. This does not mean Poe is less effective. If the tourney had 10 Scouts, 10 Palps, 10 Poes, then this ranking would be more accurate.
There needs to be an algorithm/system to average played lists. Like NBA has per 48 minute stats for players. One player plays 36minutes and avg 19pt/game, but another plays 21 minutes and avgs 12pts/game. Who is more effective scorer? Mr. 36minutes is more popular, but per 48 minutes, he is only avg 25.3pts/gm while Mr. 21 minutes is avg 27.4pts/gm per 48 minutes. Now, that doesnt mean Mr. 36minutes is worse, cause there is ALOT more that goes into like Defense, ability to spread the floor, height, speed, etc. etc.
So if we want a top list per 50 list tourney ranking:
something like: lists with scouts in top 8 = 5 / 20 total lists with scouts = .25 * 50 lists = 12.5 lists per 50 in top 8.
lists with Poe: top 8 = 1 / 2 total lists = .5 * 50 lists = 25 lists per 50.
list with Palps: top 8 = 2 / 8 lists = .25 * 50 lists = 12.5 lists per 50.
So, now who is more effective? Who is more popular?
If you have only 1 person flying Blue Ace in ten different tourneys, and they make top 8 in 3 of them.
1 / 1 = 1 * 50 = 50 * 3 = 150 lists per 500, or divide by 10, to get 15 per 50.
If you have 20 people flying scouts in ten tourneys, and 5 make top 8 everytime
5 / 20 = .25 * 50 = 7.5 * 10 = 125 lists per 500, or 12.5 per 50 (same as above).
Again, Blue ace, only being flown in one list, and making top 8 in 3 of ten tourneys, is more effective than scouts on a per 50 list tourney ranking. Obviously, this doesnt mean a whole. To get down to the nitty gritty, we would need to start keeping stats on everything like hits landed, hits taken, blocks, evades, actions taken, stress dealt, stress received, kturns attempted, t-rolls attempted, etc. etc. etc.