Last month, Blizzard said it was considering some big changes to Overwatch’s Sombra. Despite the fact that these changes would grant Sombra infinite invisibility and teleporting abilities, some fans actually saw the proposed Sombra alterations as nerfs since she would lose some of her speed boost and would no longer be able to interact with payloads while invisible.
But speaking with VG247, Overwatch Lead Designer Geoff Goodman said that the buffs would outweigh the nerfs.
Source: IGN.com Overwatch's Sombra Changes Aren't Nerfs – They're Buffs