Ney in 14/15 had excellent finishing. 1vs1 against GK was to 90% a goal but somehow his finishing skills declined after that season. In terms of dribbling he already showed his potential but in 15/16 he peaked in that aspect. In 16/17 he started to make stupid decisions sometimes and dribbled way to much but he was our best player in the cl, unstoppable mentality against PSG and also at home against juve it felt like he was the only player who believed in a comeback, had 13 dribbles against the best defence in the world. He was still worldclass in 17/18, destroyed bayern and Real madrid defence (though PSG lost) but i think the injury which he got before the return leg against real had weaken him. In 18/19 he was worldclass against liverpool and neapel but i saw he was a bit slower. The injury which he got that season had completely destroyed him i think as he was a lot worse in 19/20 - his dribbling / pace / shooting have reached a very low level (compared to peak Ney) but his passing was still worldclass. Against argentinia i saw in the second half flashbacks of the old Ney but overall he is more a playmaker these days and need a fast striker/winger who he can feed with passes. His freekick ability has also declined.
Talent wise he should have reached the level of Messi/Cristiano but destroyed a bit his career with the move to PSG. Makes me still sad as im sure we would have won the cl in 17/18 and/or in 18/19 with Neymar. The move was a lose-lose situation for both.