Remember that throwing weapons have max range as all other weapons have. But with heave ho you can exceed this range.
Im for keeping two levels of this perk, but adding some other bonus to it. Maybe more damage, crit, lower chance for weapon drop, -AP for second level.
Throwing over walls and buildings would be awesome.
And we need something better than throwing knives for aimed throwing. Something like Wakizashi but for throwing. Craftable from HQ Metal Parts ofcourse.