To be fair I’d take a ton of that Genk team: Aidoo, Trossard, Berge, Malinovskiy etc. can definitely play at a higher level.
Yes they have a brilliant team atm. The Genk way: they'll probably become champion, then they'll sell all their good players. Embarrass themselves in the CL (since all the good players are gone and have been replaced by young talents that are not yet ready to perform), and start building a team again (-mind you they've started to become more successful in recent years, they win something every +- 5 years now).
They have a brilliant youth/scouting system; only in recent years: Milinkovic Savic, Koulibaly, Bailey, Casteels, Courtois, KDB, Benteke, Ferreira-Carrasco before he headed to Monaco(I hope he gets back and revives his career like Witsel did), Ndidi etc... Oh and they are a very well run club, always a profit.
Miles better than the current setup at RSCA, in the scouting department. Their new technical director is Arnesen, apparently he wants to attract some Celtic scouts. Please don't. They had one of the best, but they disrespected him and now he's at Ajax ...
Tbf it's the same for almost all Belgian/Dutch clubs on a European level; Genk is usually just a bit more extreme. You can't keep the team together long enough, not to embarrass yourselves in the CL- apart from the occasional surprise. Still amazed that Brugge managed to keep most of their good players for longer than one season, after they started to perform. They've even rejected a 25 million € bid for Wesley this transfer period - a more credible explanation is that Wesley just doesn't want to go to China. Usually it's okay for the EL. It's like trying to break into the top six in the PL, virtually impossible on a consistent basis.