As per the recent Google update on the search rank preference of https over http (https://googlewebmastercentral.blogspot.in/2015/12/indexing-https-pages-by-default.html), I thought of redirecting all my client sites to https. But it pulls me back because I could see some information that, loss of referral data which leads to a loss in rankings. So, I’m in a dilemma whether to move on with https or not. Can anybody suggest an amicable solution for this? How about using Meta refer tag for this?