I don't know what you mean about aliases for STEEM? (and I know even less about bitshares or EOS) do you mean your "@" address IS an alias to your STEEM crypto wallet? In which case yes you wouldn't want it too convoluted. Otherwise if you can make an alias to use instead of your "@" address I don't see why it would matter much what your address is.
If the 12 character names are derived from base-32 encoding of a 64 bit integer (as it says in the blog post you referred to) then a whole lot of people around the globe wont be able to get a good name as the characters in their alphabets wont fall within those constraints (A–Z and ten digits 0–9).
Yeah the alias is the @ and the username you have selected which is way more human readable than what the public address will be associated to the address which will look like this. EOS8BgwWgpohUXFrUAtMQUaME7yCuUVqJWwVVdmJuPjy1XZ2LUUsS