That was one of things I found most surprising about Daredevil, that they actually let them do what sounded like a very hard R ( I haven't seen it yet, but it's one my Netflix disc queue) movie set in a univeser that had been consistently keeping things at a PG-13 level up to that point.
Are you talking about Deadpool? Because the 2003 Daredevil feature was PG-13, and it was a standalone movie (aside from the later Elektra spinoff).
Anyway, I think it's fine for a shared universe to have different parts of it operating at different maturity levels. If every work in the universe targets the same audience, that kinda takes away a lot of the value of having multiple different series. Look at the Doctor Who franchise at its peak, which had the core show for family viewing, Torchwood for "post-watershed" mature audiences only, and The Sarah Jane Adventures targeted at younger viewers.