Personally, I would say they are not particularly easier, and I would not count on all taking to spot feeding. But that is my opinion. If they take to spot feeding, I don't see why it would starve. I would still suggest a good 100+ lbs of LR, personally, and definitely a mature tank. Most will still die in 12-18 months, like Linckia, of starvation. Most I see are dying at the LFS, of acclimation shock.
Their diet is unknown, like Linckia, and thought to contain more sponge, but they may be surface film feaders (not so much algae perhaps, but the ecosystem that is sustained by that - microbial films, ciliates, etc).
I would not let the small size fool you into thinking they can go into small tanks. Like Linckia, IMO at least, most will die in smaller tanks.
Ashlar - can you give more specs on tank size, amount of LR, and when it died? It would be interesting to know....was it the tank you have specs posted for? That tank would definitely be suitable for such a star.