The 4e parcel system has two significant assumptions:
(1) The loot is tailored to the party. Optimal loot division from a party power POV must both be fair and not leave any item gaps. If the DM won't/can't fulfill those conditions, the parcel system is unusable.
(2) The party has to split loot from a party power POV. If the party won't/can't do that, the parcel system is unusable.
If the group can't fulfill both those conditions, the easiest fix is raising the magic item resale value to near 100% and dropping the magic item purchase tax from 1d4X10% to near 0.
(1) The loot is tailored to the party. Optimal loot division from a party power POV must both be fair and not leave any item gaps. If the DM won't/can't fulfill those conditions, the parcel system is unusable.
(2) The party has to split loot from a party power POV. If the party won't/can't do that, the parcel system is unusable.
If the group can't fulfill both those conditions, the easiest fix is raising the magic item resale value to near 100% and dropping the magic item purchase tax from 1d4X10% to near 0.