Changing quixote.get_field?

I'm considering changing the interface of quixote.get_field().  I
find the function to be handy for quick access to form fields or
query parameters.  However, the fact that it can sometimes return a
list is quite annoying to deal with correctly.  Looking at my code I
see I mostly forget about that.

Does anyone object to changing quixote.get_field() to return the
last field value if there are multiple values?  The behavior of
HTTPRequest.get_field() would remain unchanged.

Alternatively, I could introduce a new function and leave get_field
alone.

Regards,

  Neil