I don't want to break any hearts but there are more fan bases than just the Jays that think their team has Vlad Jr. locked up. I wouldn't etch that into your brain until July.
Anyhow, what is very interesting this year is the course of action of the teams who cannot make a signing of 300K+. There should be a few trades involving these slot values. If a trade were to arise, a team receiving a slot can only acquire up to half of their international pool (a team can only increase their spending pool by 50%). The team's that went over 15% last year were the Yankees, Red Sox, Rays, Brewers (the penalty being that these teams cannot sign any int'l signee for over $300,000).
It'll be interesting how those aforementioned teams leverage those slots as they can trade them, but they are not afforded the opportunity to use them themselves unless they strap themselves with a bunch of less-sought after, <300K signings. So the utility of these slot values are best served via trade. With the new CBA coming, teams will only get one to pick their move in their sole experience with the current system. You would think the most prudent teams would make the effort to move these slots and procure some sort of value - I am looking at you Cherrington/BoSox.