Well there is a change in the wallet app, and also in the wallet section of the watch app. It's a new section called 'express transit' and basically allows to set a card as the default for transit, so that payment can be completed faster by just tapping the iPhone or Apple Watch on the NFC reader without needing to double-click any button and/or authenticate using Face ID or Touch ID.
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They did make some visible changes in Wallet (and also in the wallet & Apple Pay section of the Apple Watch app) including that the recent transaction listings now include the map for the location where the purchase was made, taken from apple maps, and a new settings section called express transit that allows to select a card to be used for transit where the payment will be automatically made by simply holding the iPhone or Apple Watch near the NFC reader with no need to double click any button or wait for any authentication.