Seeing as the IDs would be server-side, no, it wouldn’t.
You overcomplicated this for absolutely no reason. How you managed to get seven upvotes is beyond me. The Loot Drop system is not affected in the slightest by an id system, as they’re completely independent of each other. Someone gets a drop? The random number generator goes and creates a new id for it, if they can go and tag every item as soulbound within a week, they can most definitely tag every item currently in the game with a random id.
You underestimate the power of Flash, for years it has managed some pretty profound feats. You assume it’s just some niche thing that Wildshadow picked up on, but even some big name titles were created on Flash. It is common for people that have no idea what they’re talking about, to say that changing the source code is going to automatically make the game 10x better, but that is like saying Lost Halls is a good dungeon or Shatters is a bad dungeon, it’s false, completely and utterly false, it shows that you have minimal to no knowledge of coding.
In Short: To Fix the game, it isn’t going to be a promise of maybe or tomorrow, you have to do something now or you will lose the playerbase. The ID system would work, but sadly Deca treats this game as Kabam treated it, a side-project that has a limited lifespan. They give it 10 Years, I’m not too sure about that.