https://webmasters.googleblog.com/2015/ ... cheme.html
I thought it may be really difficult to do so for us as well. But just recently I had a look for headless browser frameworks and I found htmlunit - in a very simple test I was able to run this tool and get full DOM-enriched content from AJAX-driven web pages.
That means we have the opportunity to get better crawled content. I am currently investigating opportunities to create a new crawler based on that.
As there is a plan to create a 'YaCy2' made out of single components (see kaskelix.de) the 'new' crawler using htmlunit could become one first of such components.