Well, this model is good for one and all. Volume traders, API traders, traders in the INR market and market makers, everyone who have been waiting for reasonable trading fees will benefit from this model. This list is not exhaustive.
With improving trading fees, trading volumes are bound to increase. This will eventually make the markets more liquid, meaning, it will now become easier for you to execute your trades at the price you want. So even part-time traders or occasional traders benefit from this new structure at the end of the day.