Different packages have different names. For instance Matlab has log and log10, LV formula and mathscript has ln, lnp1, log10 and log2.
Imho you shouldn't change. You're releasing a package which is essentially muparser, and can even work happily with the unpatched muparser, so users could expect a high compatibility with it. Besides you're already at version 1.0. You're going to irk your user basis...