Both continent size and continent amount are out of control since they're generated by Perlin Noise (same as PerfectWorld3, I don't know which one came first). The only way to (unreliably) lower the amount of continents is to lower the scatter values. You can try 0.001, 0.001 and 0 (landMinScatter, landMaxScatter and coastScatter) for the ultimate blocky experience. Note that this also reduces the amount of lakes though. (For Communitas, lakes are just small inland seas)
Next version (v2.1.0, to be released with the next VP version) will have blocky be really blocky and stringy be really stringy. The normal option will be around the same as the current blocky option.