Alright, so as Gregg and triggerfan mentioned, I have convinced both of them, in addition to others that have the space, to make the switch. Here's my two cents.
As far as dosing, if you're running a softie and LPS tank, it will do 95% of the lifting. Even with some sps, like Gregg, you just might have to only dose alk. Some of that is contingent on the salt you use and the rate at which your corals grow. You'll never need to dose anything more than alk or calcium from what I've seen though (again, that's contingent upon you using a decent salt). Your trace elements will be in check and never swing. Daily water changes don't just dose, they also remove unwanted things.
As far as waste removal, the stenner pump alone probably won't be able to cover everything. I'd most certainly recommend running a skimmer simultaneously. The fact is, 2-3% daily, or even 30% weekly just isn't enough to meet the nutrient export demands. Eventually, your nitrates and phosphates will get out of hand and algae will thrive. However, with a daily water change, you're essentially reaching the same amount of export on a weekly basis, as if you were doing a weekly water change, but the nitrates and phosphates won't fluctuate as much. Corals need phosphate and nitrate for photosynthesis, so instead of having a larger weekly swing, you're getting a smaller daily export.
On both the dosing and exporting side of a daily water change, you're better off. It's more stable. There's a reason we don't dose our alkalinity solution just once a week, and a reason we don't turn the GFO reactor on once a week. A smoother, more gradual process allows more control over parameters and is more stable for the corals.
