With the amount of touches he has, and the fact he doesn't have as much time to build a rhythm (touches for Bron and Love) as he normally would - he's playing about as well as he could be.
You're undervaluing his role/load on the offense. Plus in the 127 minutes he's played without Bron, his FG%/TS% (63%) is considerably much higher than playing with Bron on the court, on a higher usage rate - with a higher assist rate and higher hockey assist rate.
Well as evidence from the minutes he doesn't play with Bron, that isn't entirely true. Kyrie is arguably the best one-on-one player in the league, there isn't any player that can make the game easier for him, that he can't already do for himself (it's the distribution of offensive workloads more than anything else). Yes, granted Bron is the better passer out of the two, but the mechanics as to why they have more success with Kyrie playing more off the ball in half-court sets, is because Bron in his current state isn't able to (broke jumper and unable to move around the court as well as he once did).
Well the problem with that comparison is, Kyrie isn't playing as well as Wade did in 10/11 (although the margin is minimal), however Bron isn't playing close to where he was in 10/11. There's a bigger gap between Bron's play now and 10/11, than there is in Wade's 10/11 play and Kyrie's this season.
Which is half the reason why Kyrie has been performing better - as I said Bron's highs have been much better but they've been brought down by his lows and just overall general passiveness, clumsiness and inability to break down defenses.
Him being the most valuable piece doesn't even need to be said, the argument over who's been the best performer so far does.