Well, you may be right about the tensioning but i try to leave some play in the cups and cones. I've not had wear issues with the opposite side's races they look brand new. The damage was done mostly by salt-water intrusion, after i pulled the wheel apart the right side(pictured) was full of rust and rust grease, it had already been going for a month or so that way.
The most recent pictures are from today... and by over applying grease there hasn't been further slushy salt water getting past the dust seals.