As an AA DCA-based flyer I certainly wouldn't complain, but I kind of doubt it. It would have to be landside or else could only serve 1 out of the 4 airside areas. If you are Plat with AA it would probably be worth if for you to bite the bullet for the Citi Exec card. I've been able to get retention offers the last two years for a $450 and $250 statement credit, respectively, which definitely makes the lounge access worth it to me (plus the 8 friends/family I have as AUs). Not to mention the EQM credits if you can swing putting 40k on it.