You are right, but none of those criticisms apply to Tcl, which is both beautiful and integrates really well with the Unix environment. I won't say that it is perfect, but it is really, really good. A better choice than Perl where Perl is used, a better choice than Lua almost everywhere Lua is used, often a better choice than Python.

Tcl is horribly, terribly under-appreciated. It is one of the great might-have-beens of modern computing, almost as much as is Lisp.