I agree that redwood is way to soft for this use. The racking force of, say, hand planing might not affect the glue, but could very easily tear the soft wood apart at the joint. I would at least use Douglas Fir but better yet, some harder wood. Many high grade work benches use Maple. Having both an end and a front mounted vise is a really good idea.
The thickness of the top increases the hold of dog hole clamps and increases the mass so the table stays put. That design should last you 150 years or so.
The more I do, the less I accomplish.