I don’t have platinum because I couldn’t find the value in that card. Even with the gold card, I haven’t used the travel credit for reasons you note above.

I don’t use their travel service because I always find it more expensive. For example, upcoming res at a Hilton branded hotel in New York state. Amex quoting double for same room. Even applying my annual travel credit, the room would be considerably more.

As to booking flights, even if the price is the same why deal with an intermediary? If you are in an IROPS situation, it would be very frustrating.