I'm all for a capacity increase, but even if this doubles capacity, all boarding groups will still be gone in a very short time at 10am and 2pm.
And considering once you've got a BG, there's a 50/50 chance of sitting in the back behind the barrier. Haven't people said the clear barriers on Kilimanjaro Safaris affect the views? I'm not going to be a happy camper if my only shot at a ride on ROTR for the day results in a less-than-stellar view of everything in the attraction. Not to mention since we can only visit one park per day, reserved in advance, that we can't just try again the next day for another 50/50 chance at an unobstructed view and then go to another park if we don't have any luck.