There is a rich and plentiful library of wonderful content yielding an awesome variety of level 75 equipment, it is a shame for that content to go to waste.
There should be 75 cap dungeon instances of Beadeaux, Davoi, and Castle Oztroja, with NMs inside leading up to a Boss. These 75 cap dungeon crawls would yield Item level 119 equipment. The dungeons should be hard, requiring 12-18 people well geared, and the rewards should reflect that difficulty. This will make all the old content relevant again, people will want salvage sets and 75 abj gear, and will make linkshells relevant again as well, requiring an alliance to beat it.