the Authority only gives consent to Epayments Systems Ltd to conduct business with an agreed list of customers
I don't want to defend yet another EMI with Russian ties... however this is really evil from the side of FCA. Basically what they want it for ePayments to lose any useful functionality and become a dumb account that cannot do anything.
Afaik something very similar happened with Paxum which is also very restricted and useless.
I don't see any viable business model for such EMI, basically no revenue possibilities, low margins, if you want to do something like Revolut you will get hit by KYC of absolutely every transfer. So probably the only thing that can happen is that ePayments will allow users to send money to another account registered in their name and then they will shut down.
It is a shame, though yet another reason to use an alternative payment system such as Bitcoin.