Just noticed this and wanted to share with all Netgear R7000 users. The manual of the router suggests to keep the 1st and 3rd antenna at 45 Degrees outwards to get best performance. Today I tried twisting all the antennas to straight 90 degrees facing upward then slightly tilting the 1st and 3rd antenna outward by about 20 to 30 degrees (between) and got much better speeds at further distances. Just give it a try and reply. 
