With the number of op-ups for card holders at the moment there's a good chance that a pre-selected exit row seat will be available when you arrive at the airport due to a status holder going forwards. Ask politely at check-in.

edit

iirc the exit row aisle seats actually have restricted legroom due to the inflatable slide attached to the room eating into your space (in addition to the restricted seat width due to your table and IFE being in the arm of the seat.

lastly - have you MMB'd to see if there's an option for you to get a cheap upgrade to WTP ? seem to be some excellent deals at the moment.