I like the Relays. Simple to add, to repeat, and an upstreams Name propagates downstreams, and so on.
But I often connect wires with Geometry parameters also for the option to Preview individual Outputs or Inputs on components which would show “too much” if previewing the entire component. Typical case is EndPoints (like, which end is Start and which is End?). But, if using Relays I can’t simply highlight either outputs with the Relay, which I can if using a Geometry or Point parameter.
Same thing with Preview. Sometimes a full descriptive name with a hidden wire “connects” over long distances just as well as a visible wire, but I can’t change the wire Display mode upstreams from a Relay.
With those two features they would be very convenient to use for most typical use cases.