That's if we can count on Olave to come back. For his health purposes, he may want to retire. Honestly, even if he does come back next season and plays, I would still go after two WR's cause he won't make the whole season.
All indications, including from Underhill, are that Olave will play again. He's going to concentrate on strengthening his neck muscles and getting bigger to be able to sustain blows better. Barring a very, very unlikely trip to the playoffs, he won't be back this year. But he should be back next year with added muscle.
But, I do agree we need to add at least one top WRs to the offense and I don't think you can't give Olave a big contract after his 5th year option given his injury history. We are going to have to be ready to move on from Olave in two years.