No, they don't come in to play enough. It's improved in the patch, which means not having one in place will occasionally cost you a wicket - but it doesn't happen nearly as often as it does to accept the frustration of leaking runs.
I did have a good run fairly early on with the patch that would have made me say yes, but playing longer I just couldn't justify it in the long run.
The exception is if you're on a pitch that has some big cracks and you can hit those, you'll get good edges off the deviations - so put a slip in place on that kind of pitch with fast bowlers.
I wouldn't call it waiting 'for silly shots' - wickets in the outfield don't feel nearly as cheap as they used to, but yeah, that's probably still the tactic.