For your first concern I completely agree it should be rated R. Period. On the topic of Ryan Reynolds I think he's make a great pre and post cancer deadpool. The pre cancer wade can kinda be seen in some of his more serious roles but post cancer I direct you attention to Blade Trinity while yes a bad film when Ryan was on screen I saw deadpool. But obviously this is my opinion not everybody's
Well an argument that Deadpool is THE Wade Wilson is that all of his alternet universe counter parts (even the one's that don't have a faded memory and such) were called Wade or a variation like Wanda Wilson (or Jade if you like tallest silver more, which I do) who's lady Deadpool.