Radi - I hear you, dude. OSE's backend index, Mozscape, hasn't kept up as well as I'd like with being able to process as much of the web's links and pages that we need to get a comprehensive picture. I think that's why a lot of folks also use Ahrefs and Majestic to bolster their link data. Mozscape is good at a few things those others aren't - Page Authority and Domain Authority are quite good (very well correlated with Google's rankings), Spam Score is a very useful metric, and OSE has a lot of metrics like MozRank and MozTrust that you can't get elsewhere.
But, the downside is that calculating those metrics is a hugely computationally expensive process. Every few weeks, Mozscape takes all the links and URLs it's seen the last 90 days and starts a processing run that takes 20-30 days. When it finishes, we get a new index. We can't overfill that system with too much data, or it breaks
What we need is more resilient, real-time system that can scale with hardware, and that's what the team's been working on.
In the months ahead, you should see Mozscape improve (particularly for US and English-language links and websites), and around the end of the year or beginning of 2017, we expect to have a system that can process large numbers of links in real time.
Apologies that our tech hasn't kept up with the needs on this. Despite a huge investment over many years, we've not yet been able to launch what's needed, but we're relentless and we'll keep at it until we get there. We know it's too important to give up on.