I firmly believe KdB is worth it. He's an excellent player, not just in terms of his skill but also his drive, energy, and desire to influence the game and even make magic happen, sometimes from nothing. He's shown that specialness that only the greats possess and he looks to still be improving. Quite frankly, I'd take him over Hazard any day because, while Hazard has the better technical skills, he still all too often focuses on showing off without end product. KdB is ruthlessly efficient. Not to mention Hazard's diving.
Maybe a tad unfair to compare Sterling to KdB given his youth, but I've never seen Sterling have the singular impact on a match for Liverpool as KdB has had for Wolfsburg time and time again. And that's exactly the sort of player we need!