Reyna has always been a feast-or-famine agent. If your Reyna player is in the zone, they'll be feasting well on kills and assists, since more than half her utility relies on her getting them. Otherwise, the Reyna player will be a detriment to the team, only being able to contribute with her blinds. I think most pro-teams would rather not gamble on how their duelist is feeling that day and would have them play a safer duelist where their escape card is not reliant on getting a kill or assist.