Do you mean cloudflare has had issues presenting your site to googlebot and you've not been delisted, or you use cloudflare and you've not been delisted?
I mean I've not noticed any negative trends in Googlebot spidering my site, and my site's rankings have not changed since I switched to Cloudflare 3 months ago.
As someone who uses CloudFlare on a site that depends on Google traffic (~800K/month directly from G), this is simply not true.