I believe he is a top-20 talent at this point.
He's a scoring guard and his excellence is attributed to his exceptional efficiency as a scorer. However, he is a below average defender (and one could argue that "below average" is a conservative take) and he is a fairly unimpressive passer and playmaker. In my opinion, he is fantastic at creating for himself but not as effective at creating for others. Depending on how much value you place on scoring, this could put him in the top-10 conversation due to how terrifically efficient he is, but I believe there are players that can do more in addition to efficiently dropping 20 or 25 a game.
Guards like Paul, Steph, Harden, and Westbrook produce comparable scoring output to a degree, but make other major contributions to their teams. Even in a case like Westbrook, where his shooting efficiency is substantially lower than that of Kyrie, his defensive impact, rebounding, and his ability to create for his teammates are more than enough to make up for poor shooting percentages. Or in the case of Harden, he scores significantly more points (approximately 7 PPG) and also drops 4 more assists than Kyrie in about 3 or 4 minutes per game. Sure, Harden is not a DPOY candidate, but he brings more to the table on the offensive end in a substantial tangible way that Kyrie cannot match.
One thing to keep in mind is that Kyrie is still 25 years old and his game is still developing. Time will tell if he can develop other aspects of his game and take that additional leap. But even if he were to stay the same, he is still a great player in his own right, and his game will age well given his below-the-rim style of play.