Jimenez is ranked 7th by Soxprospects. 10th by MLB.com, 8th by prospectslive, and 10th by BA.
That's high, but that's not super hyping a guy up either. That's a range you're in if you have talent but aren't a blue-chip prospect either. I think he's appropriately ranked and has the potential to take off if the power comes. Here is what SP has to say about him.
" High ceiling, low floor. Wide range of outcomes due to how raw he is and how much development he has left. Can dream on him becoming an everyday center fielder who adds value at the plate and in the field. One of the highest-ceiling players in the system and could establish himself nationally with a strong full-season debut. Will flash four average-to-better tools at least, but is raw at present. One of, if not the most athletic player in the system. Improved physicality and changes at the plate give him a much better chance to hit and to hit for some power as well. Needs work to refine his defensive game, but has the athletic ability and arm strength you look for in a centerfielder. Possesses great work ethic."
That's the type of guy who is usually the 2nd or 3rd piece of a bigger trade.