Here is a smile mod you can do to increase the output of cool ail from your AC. Buy a rotating vent from Amazon, remove inside cover, cut hole, and install the vent. Installing the vent will make a significant increase to the air output, it install directly below the AC exhaust, can be rotated to direct cooling, and can be done in less than 30 minutes. Several of us on the forum have done this mod with great results.
I have dual ACs and like being able to direct the flow. The factory ceiling vents are restrictive and useless in my opinion and even the quick cool vents on the inside cover still restrict some air flow.