The crawling status looks fine to me. You can increase the crawling frequency by social media promotions. They help to increase the crawling and indexing rate for your webpages.
I don't think these numbers can say very much. The frequency that Google crawls your site isn't necessarily correlated to how well your site ranks in their index, as they probably crawl sites that have more content, or sites that have more frequently changing content, more often. The engineers at google doubtlessly try their best to make their bots as efficient as possible, without crawling pages unnecessarily, even if those pages are highly ranked already.