Corporate pilot reported ZJX Center rerouted them such that flying time was increased considerably and caused a low fuel situation. Reporter stated concerns that reroutes using the new RNAV procedures in the area may be inefficient and creating unsafe situations.

Narrative

Concerning trend of increasingly surprising and inefficient ATC reroutes with new RNAV procedures; today was just an example. We received a completely unexpected reroute from JAX Center; significantly of original course via the PRICY1 Arrival. We expressed concerns to two Jax Center Sectors and one Miami Center Sector that the reroute would put us in an uncomfortable fuel situation due to the excessive addition to our original planned route. ATC not only did not respond constructively to our comments; they proceeded to route us further out of the way. We were one or two minutes away from declaring minimum fuel and considering declaring a fuel emergency and diverting when they finally turned us towards our destination.The reroute added over 100nm and 20 minutes of flying time to our original route; most at a very low altitude at high fuel flow and low speed. We've been flying in and out of ZZZ; our home base; for over 20 years and NEVER have received a routing such as this; it was not a 'plannable' occurrence. In the end; we went from landing with 1000 lbs of fuel above target reserves; to landing with 700 lbs under target reserves.Unexpected and unreasonable ATC reroutes onto new RNAV procedures and the unwillingness or inability of controllers to work with pilots when the situations create a significant situation is creating extreme hazard in the NAS. This is only an example; many operators I've talked to; including our own pilots; have noticed a marked increase in inefficient or even unflyable reroutes in the Florida airspace since the launch of the new airspace initiative in April. Some of our common regional city pairs now take 30 percent more time and fuel then they did last March and ATC seems less able to be flexible when needed for weather avoidance or other operational considerations.