I know squat about Belgian club football, but fact their national team is currently in FIFA's top spot must mean something about the level of coaching, and player development.
They have a proper Golden Generation of players currently.
Did a bit of trainspotting and for what's it worth (probably nothing), these guys as 19 yr olds (same age as Libby) were at following clubs -
Courtois - Gent
Kompany - Anderlecht
Castagne - Gent
De Bruyne - Gent
Eden Hazard - Lille
Thorgan Hazard - Zulte-Waregem (a middling top division Belgian club I think, maybe similar to Sint-Truiden)
Mertens - AGOVV (in Eredivisie at the time, now in Dutch 2nd tier)
Lukaku - Chelsea (but age 18 was still at Anderlecht), and I imagine he was already a big boy as a 19 yr old, so accelerating his development
Benteke - Mechelen (another middling top division Belgian club??)
I just find this sort of stuff interesting. When Cacace's 3 yr contract finishes (if he doesn't leave beforehand), he will only be 22. Plenty of time for a bigger move.