Short term diversion of personnel to rape trials will only cause worse backlogs in other, equally deserving of justice, areas of the legal system. You don’t improve a crappy system by making bits of it even worse.
While I agree that what is needed long term is investment in CJS infrastructure, I strongly disagree that diverting resources from other crimes would be inappropriate. Rape trials currently take 1/3 as long again than criminal trials in general. Diverting resources to even out that gap is entirely justified. And given the human cost of delay in rape trials, there’s a strong argument that redistribution of resources to favour rape trials over at least some other criminal trials is justified.