If your requirement is to only have 1 Rupay card in your wallet then there are other rewarding UPI Cards in the market ( free+paid). RuPay Ambassador Mr
@Abhishek012 will be happy to help you for any query and concerns.
Again calculate your current/future expanses and opt for a better rewarding card Rupay or Non-Rupay.
As long as Axis IOCL is concerned, are you looking for a Fuel card primarily or its just to have an Axis Rupay for UPI payments? Talk to customer care and try to convince for 2nd Card/Downgrade to IOCL but only LTF ( as annual waiver is now absurdly high @ 3.5Lakh). This way you can earn ER Points on IOCL and you can utilize 2X vouchers on privilege ( if that remains same after 21st April). If that doesnt stay the same after 21st then you can go for myzone rupay as being offered mostly LTF , just to have an Axis+Rupay card in your wallet ( but probably not much of your use).