Confusing convert.hpp class

[gbalduzz]

I was looking at the class in include/dca/phys/domains/convert.hpp as it gave me problems with changes to variadic template helpers and got quite confused.
Why do we have all this machinery, a generic class convert<To, From> which is specialized only from electron band and spin to the spin_band domain, using static memory allocations and template overloading while a simple function return band + BDmn::dmn_size() + to_coordinate(spin) would suffice?
There is this if condition:

if (std::is_same<dca::util::TypeAt<0, parameter_typelist>::type, domains::electron_band_domain>::value) 

which trivially evaluates to true for how the code is written. It seems like its only purpose is to confuse the reader.
Can I remove it, and possibly remove the whole class for a single, non templated function call?