Ahem...just kidding.
I have had the same questions about Maniger's lack of ranking. At this point there are multiple articles around the Web that say maybe Man19 was the big piece. Many of them that write articles are seeing his worth. Sullivan made the assertion back in November.
Segura only has 2 years locked in as opposed to the 5 and 6 for Walker and Marte. There's pretty strong indications that this could be where he wants to be after that, but you don't trade for indications.
The Man in RF was drafted 5 spots higher than Taijuan, 2 years later so it's not like he was completely unheralded.
I think it's possible that in 2 or 3 years I like Jackson better than I do Maniger now. That's a maybe, in some years. Other than that I have no question of young Alex's spot. Not even sure Jackson's faster, they're both getting 50 grades everywhere I'm looking.
One thing's for sure. He keeps up the .300/.500/.800 he'll be in for RoY and MVP. Another thing; Only Fred Lynn had claimed both simultaneously before Ichiro did. He looks to me like he could do it, that's the scary thing.