re Your high bounce rate – check the “Acquisition -> All traffic -> Channels” in Google Analytics then look at the “Referral” sites.
Likely you have a bunch of spam referring sites that are causing this. You can tell by the high bounce rate from referral sites like SEO-Success.com etc – all have 100% bounce rate.
Use something like ZenCache plug in to have these sites blocked.
This is a major issue and causing skewed stats in your Analytics