The more I read/hear about the special council the more I don't like it.
-It gives the GOP and the White House cover and an excuse to dodge questions
-It's a criminal investigation and collusion isn't criminal
-Obstruction of justice is hard to prosecute without a "smoking gun"
-It has no obligation to reveal the details of the investigation if it fails to uncover criminal activity
-More times than not these types of investigations only end up prosecuting underlings who committed crimes in relation to the investigation (perjury)
-It hinders the current Congressional investigations
-It could take years - possibly many, many years
Take Lawrence Walsh and the Iran Contra investigation for example:
https://en.m.wikipedia.org/wiki/Lawrence_Walsh