[non troll post]
Less torque for the same power means it just makes the power at higher revs, this just means you need a shorter diff ratio to suit, it is not an issue at all providing you gear it to keep in the power band. Lets say you have two cars, both make an average of 200kw over a 3k power band, one makes it from 2-5k, the other makes it at 5-8k, the one making it from 2-5k will make almost double the torque (by definition), but if geared appropriately so they never fall out of this power band (lets assume they slip the clutch on launch) then they will both run exactly the same 1/4 mile time, trap speed and be just as fast everywhere else assuming everything else is the same.
Heavy vehicles need more average power, not more torque, you are mistaken.
Like all performance cars if not taken care of properly they will be unreliable, you can say the same about the skyline with its oil control problems and the thousands of blown up 26s, they honestly are both as unreliable as each other imo.
Also rotaries have an almost perfectly flat torque curve so that means they can have very large power bands, sure you might need to rev it more than a bigger capacity piston engine but most the NA examples will make bucketloads of power from 5k until forever, they will usually hold torque to well over 10k rpm with a big port, the issue is you just can't safely rev a stock motor this high. If built it means they can have quite large power bands, greater than the average ~3k that a turbo skyline has, LS1s usually are closer to 4k.
[/non troll post]