In my opinion, there is no disadvantage to a sharp knife, regardless of the edge grind.
If you want to get into endless debate on the technical nuances of micro V grind vs micro Convex grind there are several threads here already that have beat that one to death a dozen times over.
There are very likely tasks that slightly favor one grind over the other, so some debate is ineveitable, but in my opinion, for the average user, as long as you can get it sharp, and maintain it sharp, the type of edge bevel is really inconsequential.
I choose to convex sharpen, only because after years of trying various stone sharpening methods, and various jigs, convex sharpening gives me the results I'm looking for, quickly and easily. (i.e. I have managed to master it)
For others, they have become proficient with different methods, and for them, that is the best method.
You will eventually find the method that works best for you, and you will then likely stick to it.
The Dc4 sharpening stone is as good a place to start as any. Have patience, and practice at it, and hopefully you will achieve satisfactory results over time. If not, then experiment with other methods until you find the one that's best for you.
Kevin