Sure, but I don't think that should prevent the Dodgers from being proactive about a trade now. I think it's all relative to how they want to approach it.
You can make a lesser offer now, using the greater injury risk and performance uncertainty as leverage.
Or you can let things play out and if Robert looks good, you're more comfortable with him as a player, but you're probably not going to be able to buy as low as you could have earlier.