Him and Manolas is still the best defensive partnership for this league. I have tried Koulibaly and De ligt (all other rare gold CBs in this league are not worth using) and neither of them are better the Skriniar. Koulibaly seems to have little to no balance and falls over a lot when tackling someone or 1v1 with an opposition attacker. Koulibaly also doesn't win enough tackles to remove the problem from his lack of pace. De ligt in game feels worse than the stats of his card his doesn't dominate a defence and win tackles enough to make up for his lack of pace to recover when he misses a tackle. Skriniar is a solid defender who makes consistently effective tackles when close to a attacker. So his pace isn't that important when manolas is so quick and able to cover a rare mistake for Skriniar.
Wins a lot of tackles
physically dominates a game
When good when he a high coverage as he rarely let's someone past him
Has good enough dribbling to carry the ball forward when needed to
Does lack recovery pace so needs a quick CB partner
He can be dragged out of position leaving a gap in the defence at time
Other then that this is a card I really can't find many faults with