This is a desperation move by the democrats
The “abuse of power” charge is meant to protect a President Biden. If Biden is elected President, there is certainly enough evidence to impeach him. However, after Trump has been acquitted of the “abuse of power” charge, then the democrats have a weak argument that Biden cannot be removed from office because a precedent was set with Trump.
That is one I hadn’t thought of. You might be onto something there.