From experience I thought the stock skid plate gave pretty good protection. Mother nature beat on mine for a good 9 years without transmitting any damage to the engine or frame.
Granted when replaced the OEM plate was a cracked, dented twisted relic of it's former self but it gave it's all properly doing it's job. The rubber isolation mounting is a major plus that the Ricochet lacks.
The replacement Ricochet I put on is starting to develop some cracks along the weld lines so nothing is perfect. Buddy Adam somehow managed to bend his ricochet. All depends on how hard one hits things I guess.
My second TW has a OEM skid plate off of a larger displacement XT which affords more coverage than the TW's but retains the nice rubber isolation mounts.