The new security facility looks new and fresh, but I'm not impressed for one reason: there's no priority channel for first class/status passengers. (My citizenship makes me ineligible for PreCheck/Clear). This just makes DCA much less predictable than it used to be, as I'm mostly in F and a oneworld Emerald.
I wrote MWAA about this - they said it was an airline decision. So I wrote AA and have added this to post-flight surveys. Seems silly it would be offered at most other AA domestic stations, but not DCA.