I'm honestly not sure that Olave is the kind of guy that can really add bulk or add as much muscle as required to get in the 200 lbs range, but it does seem like he needs to get there for his own safety.
But I do think the neck strengthening is interesting. I didn't think about it until Underhill mentioned it but it does make sense. IIRC a lot of the concussion Olave has had in the NFL were the result of him falling on his back and hitting the back of his head on the turf. Strengthening the neck would help with that. But I also think he needs to wear a QB helmet designed to protect from the back of the head hitting the turn and/or a guardian cover. His latest concussion was just from a hit and he needs to add bulk for that situation, but I also think that had more to do with him coming back too soon from his last concussion than anything else.
But under these circumstances I'm not sure you can justify giving Olave a long term contract. Maybe pick up the 5th year option and then consider a trade if the right offer comes in.