The Gyokores vs Sesko conundrum is quite literally a coin toss. It could go either way and I don't envy the person at the club who's staking their reputation on the decision.
We had a similar decision a few years ago with Jesus vs Isak and went for the sure(ish) thing in Jesus. It didn't pan out and Isak exploded. Could happen here (or not), and it's almost impossible to tell. The club invest millions on analytics and scouting so they are best placed to make an informed decision. It feels like they might have prefered Sesko but were priced out. Then again they also wanted Mudryk and were priced out so it might not be a bad thing.
Ultimately, unless you're buying a sure thing, there will always be risk and (for me) Gyokores is an acceptable risk. If he flops (and Sesko explodes), I'd find it hard to blame the club. I genuinely think it's a 50:50 and it'll be interesting to see how the cards fall over the next couple of seasons.