Don't worry, this will never be an issue. The proposed use of class leaders means they'd discuss loot before a battle (or right after the battle). People would still have to say they wanted the loot -- it'd just go faster because each class would generate one whisper.If there is a new person and he/she has the highest DKP, my concern is that he/she will wind up with loot they don't want; they may have Zandalar armor from ZG, or the PVP set. Not that the CL will give them the loot because they have the highest dkp, but just as a mistake.
Since most drops are class-specific anyway, you'd have a single whisper per item.
Nobody's proposing that we force the guy with highest dkp to take the loot!
This is a very minor streamlining issue, not really a major overhaul. I have to admit that I'm very happy with the dkp system we've got in place. I know other systems work well too, but why change the basic system when so many people in Team Eternity are happy with it?