The other very bizarre result of 5e's experience system is, as you've pointed out, the multipliers aren't rewarded, which means if you had a deadly encounter with a singe foe, or a deadly encounter with eight, you'd earn 2.5X less experience for the latter, me...
which cuts both ways; now, fights involving hordes of orcs against the higher-level party can be threatening using only the basic orc stat block, and the city militia can still battle against the fire giants rampaging at the gates without having to inflate the...