Now, to me, the Ice Ferret is a better design, the later the era gets. At the time it was introduced, in game, during Operation Revival.... and facing Inner Sphere, it is really a medium scout hunter. It is very good for hunting Pheonix Hawks, and Cicadas, along with providing fast support, once Zel is broken, and being a pretty good Elemental Taxi. But once you add in designs like the Wraith... and others like it, in later eras, you have a design that can carry a Clan PPC, and still control range. It also has other advantages, considering it is faster than a Pack Hunter, and can be reconfigured. Finally, in the Dark Ages, you get a design that can outrun the Republic's Blade, and even hope to keep up with a Nyx, at least long enough to hurt it. And it does this, without heat issues ......
Yes, it "could" have been designed better, but it is not hopelessly flawed, either ...... in it's prime configuration, you gain an active probe on a platform that is both, fast enough to act as a recon or scout unit, and is armed, and armored, heavily enough to extract itself from engagements with units typically assigned to hunt Scouts. It can even run away from heavier units, while providing it's own cover fire by torso twisting to use that ERPPC....
While the rest of the variants to have their charms, the prime has always been the one I use, if and when I use clan forces, and field one... I have found little that is better than a Clan ERPPC, for most situations ---
Nahuris