Pretty simple request, simply expand other array commands such as set, resize and deleteAt etc... to work with strings, the same way you expanded select, find and count. There's plenty of array commands that could work with strings too.

set
resize
deleteAt
deleteRange
reverse
in
append (aka concat)
sort
pushBack

I know we could pretty much use all these just by doing: "test" splitString "", and then using the string as an array, but for performance sakes it would be nice to have these commands expanded.