Flowering Oncidium Repot

[Puja]

I have an oncidium hybrid (recent acquisition) that needs repotting, but it is blooming profusely and still sending up new spikes. The plant itself and what I can see of the roots are in good condition but I suspect the medium is poor to the point where I don't want to risk waiting a month or more until blooming is finished.
Most advice concerning repotting a blooming oncidium that I could find just says "don't", but that is not very helpful for me.

My question concerns the spikes. Will it significantly help the plant to cut blooming spikes before (or straight after) repotting or will it not improve the plant's condition? Will the newly emerging spikes (no buds yet) be safe?
Can I induce a new growth phase quicker by cutting the spike then waiting a few days before repotting?