I would do that if I wanted to maintain the high end and get a better low end. I'd prefer to go with a different cam but maybe not a bad idea here. They tick at low RPM's, so be ready for that noise.
And DCR will go up and you'll have to watch the total ignition timing as your rev up into the 2000-3500 range, if the ignition timing has been set as far advanced as it can be in the present setup. But so will a lower duration cam.