Sim.
Dicionário Visual diz que é porque foi, para resumir, mais democrático.
"To demonstrate that the New Republic was not doomed to repeat the errors of the past, one of Chancellor Mon Mothma's first edits was the restoration of the Galactic Senate, to create a forum where the Republic would define its very nature. It was decided that all worlds would have an equal say in the shaping of government. This change resulted in the campital of galactic politics moving from Coruscant, its home for millennia. Member worlds would now host the Senate on a rotating basis. At this time, it is the cosmopolitan world of Hosnian Prime where the Senate convenes."
("Hosnian Prime" insert on the "Peace Interrupted" page with Galactic map)
Esta tradição começou logo após a queda do Império. No livro "Aftermath" de Wendig, vemos o Senado se reunindo em Chandrila (foi parcialmente escolhido porque Mon Mothma era de lá, presumivelmente, mas como podemos ver, girou ainda mais):
“Oh!” Olia says, thrusting up a finger. “You’re going to get a shot of what’s behind us, right? Hanna City reflects the Senate’s humble new beginnings—we’re here for the people of the galaxy, all the hardworking people. And Mon Mothma is from here, so—”
Apenas pela perfeição, a novelização NÃO aborda o motivo.