Alright fair enough. This is really bad craftmanship but if you follow these steps you can do it (better than I please) on your Rival MT10. My method is slightly different from Lumikko's way, I do not remove the rear assembly in its entirety:
1: Remove these ten screws. You will need HEX1,5 -...
Can confirm, doable with simple hand tools, relatively easy and has a dramatic effect on how the rear suspension behaves. I did it on my Pro4, will do to my MT10 as well. It suffers from the pro-squat even more, I suppose due to the considerably shorter wheelbase.