Hello,
My suggestion is to develop or find technology partner to manufacture antennas with more gain and size for ePMP products. For example in a Multipoint topology, using AP 2000 with sector and smart antennas, it should be available antennas for remote radios (subscribers) like ePMP 1000 connectoized with gains of 30 / 32dBi and sizes of 60 to 90 cm, to get more distances from base station.