Revamp the following packs/raids; Amrath, Shroud, sub-t (Vod, Hound) MARTY and LoB. To scale to the current level cap on EH, and EE.
Polish their loot (base affixes, augments) and make them all use the commendation system, but add additional tiers of heroism each tier adds +2 ML, up to the present cap 28 by the time this gets done.
Expand CitW and FoT, heroism tiers the same way.
Polish loot and add heroism tiers to Alchemical and Eveningstar challenge loot.
Expand "turn in" rewards with heroism tiers. (purple dragon knight gauntlets, T5 upgraded ML 28)
Epify the Necropolis, give most loot in the pack the same heroism upgrade mechanics, even non raid stuff. In the future, have augment slots play a big part in the heroism upgrades, because they are future proof.
An example might be: TOD ring, T1 ML22 typical upgrade and cost T2 ML24 clear augment, T3 ML26 high cost yellow augment, T4 ML28 expanded cost bump the base stats of the ring up up +1 T5 ML30 (effectively ML 28 until cap is raised) blue augment, requires the equivalent of a T4 TOD Ring as an ingredient.
Expand the number of commendations and collectibles that are needed to upgrade significantly past the first tier or two. Make the gradual improvement of your chosen gear a big part of the repetition. And specific collectibles from each area a key upgrade ingredient as a gating mechanism to reduce repetition of the easiest or most farmable quests.
Institute a week long 3x repetition penalty. Or a once a day timer on all the quests, and typical raid timer on the raids.
Suddenly "end game" is back to its former glory. Yes greensteel items with augment slots and heroism upgrades... some of which should naturally be allowing new shards to be crafted onto them... but at ultimate cost; cleanser for each new shard/tier effect.