The ride should have a capacity north of 2,000 guests per hour (assuming it operates as reliably as it does in Paris), which would make it the best of the most in-demand attractions at Epcot (Test Track, Soarin', Frozen) from that standpoint. Couple that with Fastpass still being dormant, and I see no reason the attraction would need to have boarding groups.
That said, since Disney seems to be relentlessly pursuing actions to make visits more complicated for its guests, it wouldn't surprise me at all.