I have not done a direct apples to apples comparison so this is more in the nature of a background knowledge question.
If one has previously created custom Adobe DNG profiles, using either X-rite's ColorChecker Passport or Adobe's DNG Profile Editor software, or used Datacolor's Spyder ColorCheckr target and software to create an H/S/L preset (please try to refrain for right now from introducing sidebar discussions about one approach versus the others), will the changes in Lightroom 5's new processing algorithms either require reprocessing the target shots or will yield better results?