At the level of generality at which you're speaking, it's difficult to agree or disagree with you, but I can say that the problems and the dissatisfaction with the summary trial process remain at a sufficiently grave level that the B.C. Civil Liberties Association believes something ought to be done about it.
In terms of whether removing the provision allowing for detention really matters, I understand that in 2009 only 36 individuals had detention imposed upon them after the summary trial. It's not as though detention is often imposed, and it might just be that the looming threat of potential incarceration or detention from superior officers somewhere down the road is perceived to be necessary, but there's really no empirical study available regarding that issue.