Re: As good a time as any...
It is easy to get a single listening position correct. But getting it right for multiple positions is a lot harder.
So you have to choose a position and live with it, or do some sort of average around the room.
The Haas effect simply says that you will localize to the sound that arrives at your ears first, unless the secondary sound is 10dB louder than the earlier sound.
Now how you would compensate for this is a highly debated topic, and in my opinion it varies from room to room and situation to situation.
Sometimes I add additional delay-sometimes I don't and sometimes I even cut the delay time DOWN-because the overall effect in the room is better for it. It depends on the situation and the particular problems/issues with that particular job.
Sometimes you have to make one thing worse-to make another thing much better.