Mindtheproduct.com conducted a survey asking product managers their biggest worries.
Theses are the results (picture source by mindtheproduct.com)
It shows that the biggest challenge for product managers is the prioritising of a roadmap without the data to back it up.
This could be because of visions or ideas by stakeholders that are pushed on the roadmap without proof that this is adding the right value. Also, the lack of insight if certain features are solving real customer problems before- but also after implementation.
Getting the right data upfront, and setting up an effective feedback loop from your customers seem to be a challenging task for which many product managers lack the time.
At shipit we have recognised similar signals and will definitely add tools for Product Managers to address these issues to our own roadmap.