Is Viper meta yet...
I saw one the the NA qualifying games between SEN VS V1
and both teams ran Viper 5 out of 6 times on all maps
doubt it. Before the Viper buff patch going into tournament build, teams are already starting to pick up Viper. Not to mention EU has been running Viper regularly before any of the recent buff was even announced.
People are just slow to pick up agents and like the play the same old comfort pick, you need the dev to push them to the right direction (just like at AUG in CSGO)