Well, they can't keep giving 20,000 airmiles for 1L spends. Either the milestone will go or the ratio will change. Everyone knows this. It's just that they went all in.
They could have done so many things gracefully.
First, reduce it to 20,000, then to 15,000, and finally to 10,000. During this, slowly change the ratio to 5:3. Then, increase the cap for GrabDeals and GyFtr. This would make it a good 3.6% card with various reward multipliers on GyFtr, GrabDeals, and TravelEdge. Mandate ITR while issuing. Stop giving it as LTF/FYF. Instead of vouchers, give points.
Reserve: Keep the ratio of 5:4 or 5:3 with multipliers and stuff, and 2x for international. Include a bonus percentage of miles if the user is a burgundy account holder (like it is with Citi Prestige for Citi Gold customers). Mandate ITR while issuing. Include more hotel memberships.
Or allow only one active ER card.
Axis needs active low-end users to fund the premium segment. So improve the lower end segment