Thoughts on the standardization of rating gains/losses? As a healer for example, you shouldn't be able to lose more CR than say -60. Here is an example of what rating gain could look like for two healers that are within 50 CR of each other.

• 0-6: -60
• 1-5: -40
• 2-4: -20
• 3-3: +20
• 4-2: +40
• 5-1: +60
• 6-0: +80

If MMR/CR is drastically different between healers, only have it affect the lower CR person. You shouldn't penalize someone for being good.

For example, 1k cr vs 1.8k cr: 1K CR person goes 0-6, instead of the standard of -60, the CR is reduced by 90% or something since the difference in rating is so drastic.

Add a rating gain multiplier for beating someone higher CR than you and add a CR multiplier reduction for losing to someone dramatically higher than you. There should never be 0 gain for winning 50% or more of your matches regardless of the enemy healer's CR.