reality: the D&D game announcement is far bigger than another crossfire expansion. All that simultaneous would do would be to drown out the crossfire announcement in the wake of the much bigger announcement.
Yes it is and just the name D&D will mean that press release is picked up by mainstream press outlets, giving the coverage the Wizards expects and CGL needs. A SR Crossfire release would give the small press, in particular the industry press, distributers, and retailers a reminder of what the Crossfire engine is, faith that the engine has legs and can be supported in the long term and proof that CGL still supports their own IP and is not jumping onto a new ship.
A press release is a way to steer other parts of the industry toward tour product as well as inform the general public. Battletech and Shadowrun are known names in the industry but do not have the greatest track record on the retailers of distributers shelves. Things like a Tweet to a fan question can suggest that CGL sees these lines as an afterthought and dive the message to the industry that they should not support those lines. Without support at distribution and on retail shelves you can not grow you player base.
Appearances matter and this is a small industry. It will be little things like the lack of a press release that could make or break the next product cycle. CGL may be a small company but they are people that have been doing this a long time and should know these basic business principles.