That's not a balancing point, that's a design flaw. Riot aims their reworks and balance changes to prevent this sort of design. This is not justification for removing weak points in terms of timing spikes. His power spike hits when he levels Q level 1 and continues growing, spiking every kill he gets that turns in stacks.
He can be very bad behind, but being behind is much farther than simply dying a couple of times. Even on equal gold a draven will outduel about any ADC, he just has problems surviving due to the necessity to go very aggro and go in during team fights since he will be targeted as such without the extra gold. With the extra gold, he buys the necessary attack speed and lifesteal to be an effective drain tank, especially now with death's dance.