After Al Nassr committed €500 million to Ronaldo, he also made it a condition that the club bring in strong signings. It seems Ronaldo is now trying to bring Rodrygo to Al Nassr. Hopefully they sign him, because I think if Rodrygo joins Arsenal, he may disrupt the team chemistry. Apparently, Real Madrid is asking €90 million for him. Arsenal shouldn't be paying that kind of money anyway. One thing is clear, Rodrygo's Real Madrid career is over. He will definitely be transferring to another club in this window.
It's clear that Xabi Alonso has no plans for him in the first team if he decides to stay and fight for his place then he'll warm the bench mostly except he has to work hard to be versatile enough for Xabi Alonso to use him as a wingback but it's almost impossible since Arnold suits that wing perfectly, I support your statement that the best option for him is to leave now, the earlier he realises the better for him else he'll go from being one of the super stars of Madrid to a bench warmer when the new season starts. Agent Ronaldo would try to persuade him to dump Arsenal for Al Nassr and the offer they'll table would play a role to him joining the Saudi League.