Depends on what you think terrible is. I don't think you will have any issues getting to your ADR on time. That being said, I wouldn't get to the IG at 9 am...I would be there closer to 8:25. You will experience holding points along the way and will be beaten there by the guests who enter at the front of the park but at that time, the wait will be very, very minimal because of the capacity.
Switching your FP+ to Soarin (after breakfast) and rope dropping FEA is a less stressful IMO plan as the PP indicated. Now, if thats not an option, I think you're good...it's just a but more walking and a bit more rigid in terms of arrival and timing.