Chetan, Given existing config is part of 1.0.8 we would need to support both but users would not be allowed to mix both approaches.
When you refer to “existing config” do you mean only the part that configures boosting or more? If the former: given that 1.0.8 is out only for a couple of days I do not think we would create big problems by changing the the config syntax in 1.0.9 Michael
