I thought fiber was capable of much more than 50 MB. Isn't FIOS's GPON dedicating much more than that to 32 customers at a time? Why such low numbers to the towers?
It's hard to get the fiber to the towers. Monopoles usually don't sit right next to the houses. Most cell towers only have copper to them so Verizon will have to do a lot of new construction at a high price. See what happened when they wen't that route with FIOS.