"Authority"?!! They're still bound by love of neighbor (that includes us!), as they are by love of God -- that's why "the greatest of these is charity", because faith will become knowledge, hope will be fulfilled, charity is eternal.
You seem to picture Heaven as structured something like IBM or a government bureaucracy, isolated individuals jockeying for position and indifferent to the fate of others -- we see the saints in Heaven as extended family -- "the Communion of Saints"!
It's so easy to depend on other sources than God in prayer. As I pointed out...this is common in religions like Buddhism and easy to slip into..it dilutes dependence on God and it's easy to go from there to idolatry.
Now, that's just silly!
And that includes crossing back over into the temporal to act in response to our petitions? I think not.
Now, that's just silly!
No, that's reality.