Monnierara Millenium Magic 'Witchcraft' with brown areas on roots

[zane93nyc]

Hi, This is my first post and I'm hoping I can get some advice for possible root rot.

I got it last October in a 3 inch round pot. After blooming I allowed it stay dormant and then repotted with NZ tree fern fiber into a 4 inch square pot. I started watering on May 25th and the backbulbs plumped back up, but now the roots have brown areas that aren't looking too good. I feel that I may have overpotted. I removed the top layer of media to allow the roots to dry out better and moved the pot closer to a fan. Can I attempt to carefully repot back into a 3 inch pot?

I also noticed some spotting on the leaves in the crown and found a small, thin pest hiding which could be thrips. I flushed out the area with water and will try spraying with spinosad as soon as possible.