they way I've always remembered it was the only way to break the loot pool is if the alliance leader hits the dissolve button, any other party can without issue
like I said I'm not 100% on this, but pretty sure
It seems that the problem isn't the lotting system, it's the party/alliance system. I would believe that the simple thing would be to make it so you cannot disband and alliance or party while there is a treasure pool. If you want to leave the party while there's a treasure pool, you can disband yourself, but the remaining people will still have the treasure pool.
In other words, just disable the ability to break an alliance or kick a player while there's a treasure pool (roughly a 5 minute wait time until your treasure pool clears naturally if you really need to kick someone, or you can all drop and regroup without them if you must lose them immediately). As a point, you might also want to consider that if someone wants to get an item in the treasure pool, a BLM can just warp other people away and leave the person who they want the item to go it, so the problem was never really solved anyway.
As a side note, can we get a /blockaid improvement for in party spells? There are times when I am intentionally trying to maintain my health in a yellow or red point to trigger gear effects and someone in my group will not notice who's health they're healing, just that someone is low. As a different example, I've had an occasional warp out of a zone before the treasure we were hunting was dispersed to me (because someone else hadn't passed and the BLM didn't notice there was still a Mavi Seal in the pool when they started sending everyone home for the night).
It would be helpful to have "/blockaid" stop outside assistance, and "/blockaid all" to block both inside and outside assitance.
The way it works today is best.
If the alliance leader dissolves the alliance, the loot is lost. If another party leaves the alliance, loot stays in the pool for those still in the alliance (which could be a single party). The non-alliance party leader is choosing to leave therefore choosing to abandon claim to the pool. If they do this by accident, they can rejoin the alliance and the loot is still in the pool. The alliance leader can't ninja the system by booting other parties in order to monopolize the loot.
I already explained in my post that the alliance doesn't disappear unless the ally leader chooses to dissolve it or there are 0 people in the ally. Has nobody ever been in an ally where people left until there was only one person left? Guess what, that's still an ally. At no point should treasure be lost unless the ally is actually broken.
People who are coming up with wild hypotheticals appear to have very little in-game experience leading alliances.
First off: as for keeping bad company or around noobish players: you don't always get to pick who the alliance leader falls too when someone else leaves, and if that person is a noob and dissolves the alliance on accident or is in a hurry and dissolves everyone is punished. The exact situation that happened to me the other night was a 7 person team doing KSNM 99s. On the last orb (which happened to be mine) everyone started to warp away. One of the first people to do so was the rdm solo player who was also the alliance leader. As soon as she got to town and seconds before the last person was warped away other then myself (who was waiting for the drops to drop) she dissolved the alliance causing the loot to be lost. I don't expect people to be 100% on their game at all times, and shit happens, but I had a lot on every piece of loot and if she had waited 30 more seconds I would have gotten everything, but instead I lost it all. Now if there had been some sort of safeguard like say a auto distribution of the loot pool on dissolving the loot would have gone to me like it should have. People say "well if that happened people would ninja stuff all the time." I don't think so. Most of us know the people we play with, there are a few exceptions to that (the random pick up party for KSNM 99 or abyssea NM farming). But Honestly How often do you group with someone who is known to be a loot ninja? I have not heard of anyone purposely ninjaing loot from people sense the dynamis look system changed from zone wide loot.
Saenomo has a good point though, the party/alliance system could use some work. Something for that which I would love to see is the ability of the alliance leader to move people around within parties without having them disband and be re-invited.
Never-the-less the loot system was flawed (the duplicating items part) and the fix they applies to it (destroying loot when alliances dissolve) is just as flawed. You can't tell me there is not a better way. . . and being more selective of who is alliance leader is not the solution. I know that those who mentioned stuff like that were being serious but lets be honest sometimes if you want to get stuff done you have to go with the flow and that means possible having someone who does not know the consequences of actions (like dissolving the alliance with a full loot pool) mess it up.
It's what I always insist on when I run BCNM's with linkshell even. And I totally trust those guys and gals to not attempt any loot steals on YOYD runs.
Hell you could even insist that last leader passes lead to orb trader each run. And they make themselves quartermaster to pretty much rule out any dodgy dealings.