Of the three items you list, only the first is of value to people who don't fly AA, DL, or spend time in Charlotte. If all someone wants is PP membership for lounge access the Ameriprise WEMC gives more for a lot less.

The American express platinum card has other very redeeming qualities and these features are why I carry one. If all I wanted was lounge access, I wouldn't. There is no co-pay for access or guests with the PP membership via Ameriprise. The terms on this are not clear but in years of using this card I have never been charged to access a lounge or to guest-in others.

The OP, IIRC, was asking about lounge access with a Visa or Mastercard and this is the context around I posted. Don't get me wrong, the amex platinum charge card is an excellent choice for a variety of reasons. The fact American Express recently improved domestic (USA) lounge access by adding the PP-select membership is welcome. I would add another huge improvement is the elimination of the foreign exchange transaction fee for most non-USA purchases.