No, we never learned about Clint and Natasha's reasons for agreeing to join SHIELD's mind wipe program. Nick Spencer said he was going to deal with it in Avengers World, which didn't make any sense story-wise and it's pretty clear by now that he won't.
Hawkeye vs Deadpool was pretty fun, I'd also recommend checking out the current Secret Avengers run! Their interactions there have been pretty great, especially issue #7 where we get stuff like this: