I said it even before the game that I didn't see the fuss after watching countless videos of him so this is not a particularly knee jerk but I have yet to see any standout quality of his. Normally attacking/creative players lacking the speed and yard of pace to beat players compensate that with incredible awareness or close control dribbling or if not that at least great vision and passing. He has none of those, the only viable quality of his I've seen is that he seems to have a good finish on him and timing his runs from deep into and around the box. Like a poor version of delle alli a couple of seasons ago.
Outside of that have yet to see anything warranting the hype or the price being branded around. The one time he's played at a slightly higher level than used to he's looked outside his depth. Foden does the late timing of runs into the box as well as him but also has the passing range and vision to compliment that which makes him stand out. I'm afraid he would be massively found out at a higher level like renato sanches(another overhyped benfica youngster) if he moves now. Needs at least a couple of seasons at benfica or a team in a much higher level league like a dortmund to develop many aspects of his game before he's deserving even half the price being touted.