Sounds A LOT like my experience with Metzeler's ME888. They went to a harder compound than the ME880 specifically in response to Michelin bragging about Commander's durability on 800+ pound Hardleys. Gave them a better tire for Valkyries but one too slippery for my "lightweight" A. C. E. (Who would have ever thought a 600lb bike would be too light? Or that 1100ccs would be too small?) I know I pulled the tire early. And was glad to have it off my bike.Funny you bring this up. I just replaced my still OK Commander II rear tire because it tended to slip in the rain or if I applied the brake a little too hard and the tire wasn't warmed up. Pure love / hate relationship. I went with the more 'grippy' Shinko 777 HD front and rear. I only rode home from the shop, (10 miles), and most of that was getting used to the feel of new tires. I'll be happy with 9K out of them as long as I don't get the slip and slide action. I'm was at about 12K on the Michelin, but hated dealing with the sliding, and I am not a throttle twister, or heavy footed on the brakes.
Tires need to have a performance envelope greater than the rider's preferences, skills and style. That means Commanders and ME888s will be fine for some riders but dangerous for others. I'm definitely one of the others.