From the photo's you've shown, and the limited vision on those photo's, all is well with the fixing Curly.
The 'Hook' is a 'Bracket 22' (more commonly known as a bungalow bracket), which are more likely to be found on Bungalow dwellings in order to gain more height clearance from the road/driveway to the dropwire. Again, the black PVC tape is supposed to be there, and is the reccomended quality method of routing the dropwire from where it is clamped, to where it will first be fixed to mortar, ie- along the 90 degree arc of the bracket 22.
The only thing I cant see is the 'fixings' used to attach the bracket to the fascia, also, as to whether it is actually fixed to the noggins (think thats the word) that connects the fascia to the house. In other words, every so often there should be a piece of wood (noggin ??) behind the fascia board, and it's this that the bracket should be screwed to as it forms part of the fabric of the house.
Tricky ground regarding calling an engineer out, safety or not, as it will be abundantly clear that you've had new fascias and the correct process would be for the engineer to TRC (Time related charges) yourself, and you to then pass the charges onto your builder.