Liquid definitely has a high ceiling. All the players are mechanically very good that they can match anyone in gun fights on their day that is. I've seen people compare Liquid's aim with Gambit but tbf all their aims are equally awesome but I love Gambit more for their strats and stuff that you can learn many things but that's beside the point.
The problems Liquid have is the roles. Nivera and Link ok they have set roles as Sentinel and Controller respectively. Nivera could play Chamber in every map except Ascent and Split maybe. The team needs to make a decision whether to make Jamppi the perma initiator who plays Breach and Sova( his Ascent Jett is great though ) and what Soulcas and Scream would play.
Second thing I saw was the problem with liquid is that their mental once they lose a string of rounds are like 'Oh man we're screwed'. Like if this is the mental how would they win big games? I feel mental needs to develop.
Overall their skill ceiling is good. It's just the set IGL, roles and the mental must definitely improve