My admittedly un-informed opinion has to do with reliability. A winch is a piece of "emergency gear" and when you need it, its gotta work. That's why I made it very easy to bypass both the solenoid and the fuse on the spot if need be - the best of both worlds. Win-win.
Same kind of thing about the grounding for that matter. Everybody tells you to run a negative return wire from the winch all the way back to the battery. There's NO way that can be a lower impedance than grounding to the frame (with appropriate connections at the battery - very important and stock ain't it). But the likelihood of a weather exposed high current ground connection failing is fairly high - so I did both! Ran a #4 to the battery, AND grounded the winch to the frame, AND installed a bypass ground wire from the frame to the engine block AND beefed up the ground wires from the block AND the tub to the battery. That gives me both the reliability of the direct wire AND the low impedance of the frame ground. If the ground connections fail, the return wire will carry the load just fine. If the return wire fails (unlikely), the ground will actually carry the load better than the wire could anyway. If they both work, the wire will only serve to lower the return impedance an imperceptible amount. Win-win.