I LOVE VcarvePro and find that the 3D simulation renderings are quite accurate. If you see glitches there, you will see them in your wood, too. I suspect this is due to having too course a stepover (set when you choose your cutter). Also, in Job Setup, choose the finest resolution for the model. For any 3D carving that you want good detail, as with this one, you should be around 10-15% stepover on a pretty small bit, like 1.5mm or 1/32" ball-nosed taper. Yes, that will take hours to carve, but that is what it takes to get a good 3D carving, like my terrain carvings.
On the plus side, with such a small stepover, you don’t need to do a roughing pass and you can push the taper bit quite fast (I routinely use 100mm/sec).
You can save a lot of time by using the offset drawing tool to make borders around all the tricky 3D stuff and just apply the small stepover and fine bit to carve inside those areas. Carve the lettering with a much less detailed toolpath. And pocket out all the flat areas with a big flat endmill.