Look at those last winning streaks (9) of Cavaliers, they are all monster and Irving wasn't there on the floor. It's just that, there are some "missing link" that happened on the way and Cavaliers must needed to figured out what is it.
The missing link is they have to let go some of their players that has a sleeping stats for long time. Trade before the deadline.
I don't blame their playing time but it's clear that some of them are not contributing when they have time to showcase their performance on the game.
Or maybe change their system, if the current system is not working then they should switch to a defensive system like the Pistons and the heat and employing. The problem with the cavaliers is they easily give their opponent a chance to score more, they have the skills and I don't think they cannot do a good defense.