I agree. Blue buff is really shitty and doesn't improve the impact of gankers at all unless you're a jungle champ with really high cooldowns or a mana hog like amumu/fiddlesticks. Blue buff should have some sort of effect on spells like Red buff does for auto attacks.
Hey, this just came to me, what if Blue buff gave SPELL VAMP on top of the other stats? That would make jungle a interesting choice for all characters even ones without resources. I mean Riot has already told us they want to do away with spell vamp but keep it in a way that's healthy to strategic play, wouldn't that be an awesome trade off? You can get spell vamp from jungle but if you don't use it to farm you won't get as many clears and that way teams can't just stack spell vamp to out sustain team fights
That would be fucking awesome..