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CSR cannot really be a better card unless they eliminate the generic easy to get travel credit and make you work in order to reap the reward like AMEX does. But in a general i would love a chase card with supermarket multiplier on UR ecosystem. Probably even that may be too good to ever be true.
Yeah, I don't believe in fairy dust and unicorns.
A base 1.5x would likely be doable, considering that so many people already have one of the Unlimited cards and earn 1.5x domestically.
My preference would be occasional transfer partner bonuses. TYs and MRs offer them occasionally, but I don't believe I've ever seen Chase offer one.
Instead of improving on their top benefits card--they should do the same thing AMEX just did and focus on the runner up (CSP) so more people would want to keep it--myself included.
It's one thing to wish for something to get better but you have to be realistic. The CSR is still the #1 sought after premium credit card and Chase has absolutely no problem getting people to apply for and keep the card as is. They have ZERO incentive to change or improve the card. There's a better chance of them nerfing the card in some fashion more than improving it.