I have mixed feelings. On one hand, the data harvesting targeted by cookie laws and associated privacy stuff is important and legislators/regulators are right to target it. OTOH, effectiveness is pretty marginal. There have been some (minor) gains on disclosure. Somewhat better progress on data selling/sharing/security. But, no real gains on consent, which is a big part of the regulatory effort and this specific case…
But, it does give internal employees the tools to fix it in smaller companies, or smaller companies that use the services of these global companies(ex, google analytics).
Pre-gdpr, if I raised some of these points in any of my workplaces, nothing ever came out of it. Now, it's a different story.
Same with direct-marketing spam e-mails, where a customer complains.
It'll take some time for regulators to sort out the big offenders, but the regulation is already having a positive effect within smaller companies.