Ah interesting. I guess we could do something like:
show a button "Edit" on the delegation card (split with the undelegate button)
redirect to the delegate page, and from here add some logic to detect if we're already delegating to this address, and if we are, then instead of undelegate + delegate, only delegate with the new amount
Got the feedback that there is a need for someone, in case wanted, to be able to increase their delegation (not just replace)
@Tbaut Do you think that this request makes sense?