If something might/would not go amiss, it would be useful and might help to improve a situation.

A word of apology might not go amiss. 道个歉或许并无坏处。

A sense of proportion would not go amiss in all of this. 在这种情况下有点分寸感应该还是有好处的。

A bit more time spent on preparation wouldn't have gone amiss.

I think a little advice on healthy living wouldn't go amiss.

A few more hooks for bags and coats might not go amiss.