One unique thing I want to see implemented in the crypto wallet, is the ability to call back a transaction within certain hours. One reason why scam is rampant in crypto is because the moment you send, you are not getting or it back and this have made people to start looking for solution outside the system by bringing in human capital to act as escrow. If this is inbuilt, the cost of hiring an escrow and the risk associated with it would be avoided.
you can't implement this in a wallet. you need to implement it in the cryptocurrency itself and one of the main features of bitcoin and others is that they are not reversible and that has been a good thing because it has eliminated a lot of scams.
as for escrow you don't have to use a third party, you can always use a 2 of 2 multi signature address (you hold one key an they other party holds the second key). and although it is not as convenient as using an escrow with 2 of 3 multi sig but it can be done.
