For now, it remains to be seen which will outweigh the other, but word of the nerf and buff comes not long after confirmation that a Revenant buff is in the works, and likely coming during Season 9 as well.
Of course, depending on your playstyle, the buffs may outweigh the nerf here, but it's a pretty substantial nerf, though not an unexpected one.
Typically, game balance is something that changes constantly, especially in the testing phase, but with Season 9 less than a month away, it's safe to assume if any changes are made to these buffs and nerf, they won't be major ones.