Need Opinion on whether to repot Oncidium Twinkle

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So I took out all the media to find mostly charcoal and one microscopic piece of sprag. I found not one plant, but 2! One with 5 rotting pseudobulbs in the media!!! I have NEVER seen a case this bad, where it looks like someone literally shoved a plant under the media and didn't care. It's surprising because I got it from Hausermann's during their open house. The whole thing smelled awful! So I trimmed dead roots, which surprisingly there was not that many of, but I did lose quite a bit trimming off mushy parts. The plant on the right was in really good shape, but I'm not sure the plant on the left will make it. I closed all the wounds off with hydrogen peroxide and repotted in leca and seramis. Mostly because the roots are pretty delicate and I needed something more water retentive.