I am glad seeing a Roadmap here after missing it almost two years.
Seeing the release date I would like to come again in front of you with a top priority situation: Gold Plus users and updates to those modules which are parts of Gold Plus. For example I need all the updates for X-MultiCurrency, but in 4.5.5 there are not included (in this moment they are final). Really I don't want waiting 3 months or something just to get a new branch which could have these updates inside.
You have to find a solution. See more details here:
http://forum.x-cart.com/showthread.php?t=66434.