All my pages in -50 in the serps since april1, but now google crawler is crawling me more than ever? Does that make anysense?
How was your pages/site ranking before? Are they on the first page and now shown on 5th page? Maybe you can give some additional content update for your pages for Google bots to fetch.
crawling or indexing doesn't mean you can get high rankings... you still have to compete your targeted kw/s..