Hi 3DAP,
Switching to 2.4GHz will not help this. This lag that you are noticing on the ground is generally so minor it will not be noticable in the air. As far as if there is going to be a 9ch 2.4GHz FASST combo, we have not been told yet. The TM-8 module/receiver combo should be available around the end of the month.
Bax's answer to this in a previous post may help you out a little with this:
http://www.rcuniverse.com/forum/m_29...tm.htm#2981157
Sincerely,
Krysta
Product Development & Support Specialist
Futaba Service Center USA