Ditto. Get your Oxygen under control.
If you want to test your next batch to the max force age the beer by putting it in your hot press for 10 days, that'll act like a lot more days at ambient temperature. Remember for every 10 degrees C upwards the beer goes in storage the oxidation rate...
My mom takes the spent grains I give her and blends them with dates and then bakes them like biscuits. Then top them off with Dark Chocolate and allow it to set in the fridge.
Lots of things you could do here.
Starting with a high mash temp will make up some of the body loss that a drop in the grain bill might seem to give the beer. Keeping specialty malts the same would be nice. I wouldn't add water post boiling and i wouldn't let the run off go really weak either...