I know they released a box set with the 6 studio albums remastered in 1999, but I don't have that box set and I don't believe they released the remastered albums to be bought individually on their own, right?
All the studio albums were remastered in 1999 by Bernie Grundman, and they are available individually. The individual remasters are the same as the ones in the box.
Also, does anyone know if the '99 remastering job was any good.
Quite good. HDCD, 24 bit mastering. They saw it necessary to include the two controversial bits in the songs "Break On Through" and "The End" which were censored on the original mixes. On the remasters, they took those bits from the recording tapes and flew them in.
In my opinion, the DCC Gold CDs of the Doors albums are even better. Four albums were released that way: The Doors, Strange Days, Waiting For The Sun and L.A. Woman. I don't think that you will ever get better CD representation of these albums than that.
The L.A. Woman DVD-A has also gotten favorable reviews.
Does anyone know if there are plans to overhaul the Doors catalog like they did with the Byrds?
I don't think so. The original tapes are in excellent condition, so there is no remixing necessary. I am not sure about outtakes and alternates.