I completely disagree - boosting capacity of the Smiler is desperately needed. For a headline coaster at Towers, anything under 1000/hour is simply not enough. When fastrack is added to the Smiler the queue will be just as slow as Rita's is now unless they can push the throughputs a little higher. If the ride maintains its popularity with guests it could lead to agonisingly long queues even several years down the line.
For me, a bigger benefit to my queueing experience than seeing the trains duel would be a faster moving queue, and even then there will be a few trains that duel as it's inevitable that some trains will be dispatched slower than others. Also with faster dispatches there's more to see as there will always be a train somewhere on the track, rather than having 2 at once and then none as the ride currently operates.