How exactly do you expect Gangplank to survive in melee range with 79 health/level
His passive doesn't proc on his Q, only his melee attacks, yet he has 79 health per level
How exactly do you expect him to survive in any teamfight?
Fyi, 79 health per level is lower than many ranged champions, including Fiddlesticks, NIdalee, and Ziggs. Yea Ziggs, that long range poke champ who deserves higher hp/level because he has to get in melee range
,
, 
was the only recent rework that made the champion significantly better to play overall.
reworks.