There is nothing wrong with a good looking plain rifle with no carving whatsoever. If you love what you have now, then why try and improve upon something that doesn't need improving? There is a fine line between wonderful and oops.
That being said, I don't think incise carving is easier for me, to the contrary, I think it might be a bit harder. I have two veiners… one is a 30 degree, the other a 90. But with both, it is difficult to control line width for me. On the other hand, relief carving is easier for me, since line width is not a factor. Engraving for me is also difficult for this same reason, though with engraving, the heel of the graver gives me a bit more control that I don't really have with a wood chisel.
But really... Practice is the answer. Before I carved my first rifle, I had absolutely no experience in carving. Except what I did on practice plates to do the carving. I had my design, and knew what I wanted, so I took a couple pieces of the waste maple and did the design on those first to learn how. I only had to use one of the plates, and it came out much better than expected. I did this with a couple carvings after that, and then felt comfortable enough that I didn't think I needed to practice first anymore. Today, I just draw the design on the stock and carve from there. But if you are even slightly uncomfortable with your first, do try a practice plate just to learn the basics. Carving and engraving are not difficult, but do require a bit of eye-hand coordination, which certainly can be developed with just a little bit of practice.
Matt