Well, we lived, haha.
I talked to Jack Hidley over at Maximum Motorsports on the phone today. Learned some very interesting things! I did NOT know this, but did you know that tubular K-members are more about saving weight than they are adding stiffness? Some may not even actually be stiffer than the stock one. I had no idea!
We were talking about why in the world my car rides so terribly. One of his suggestions was a k-member brace. He also suggested a brace linking my rear front seat bolts to the subframe connectors. I'm not exactly sure how that would be accomplished yet since the tubing goes through the floor, and most seat braces wrap over the top of the subframe connectors. I guess maybe just a piece of heavy gauge steel tying the bolts to the connectors.
He also suggested my seats may not be supporting me like they should, so I should check the seat foam. I was thinking of replacing it anyway, so I'll probably do that. He also suggested checking the rear upper control arm bushings. I guess it's worth the extra cost to just replace control arms themselves since the bushings need to be pressed in somehow without collapsing the control arms. Makes sense.
I guess the OEM Ford SN95 balljoints are a special low-friction design and most aftermarket ones don't bother with the low friction component. That made a lot of sense too. Friction in the suspension adds to harshness, WHICH I'VE GOT.