Organic reach from all pages on Facebook is going to decrease significantly as a result of a change to the FB UI, where Page content will be split up from personal Profile content. This change is still in the process of rolling out globally, so if you haven’t seen it yet, you probably will soon.
Moving forward, people will see personal Profile posts, predominantly, in their default feed, along with PAID content from Pages. Organic Page content won’t be seen nearly as much.
This may also impact paid ad ROI, eventually, as more page owners begin to rely on paid ads, reducing available inventory. In the meantime, with the reduction in Page content, there may be additional ad inventory, which could potentially increase ROI in the short term.
Another approach to consider is leveraging personal profiles for professional use. Be aware of considerations relating to their terms of service (i.e. be careful about posting ads from your profile, etc.)
Another adjustment is to leverage groups more extensively, as these seem to still be coming through the default tab.
In the meantime, keep and eye on your organic reach, and for important page posts, it is increasingly important to do paid boosts.