The highs are not recessed on the LE for sure, but I think most people say the 80 ohm has pronounced highs as well. Are you sure its not the upper mids you are hearing as recessed? Because I would agree with that on the LEs, but treble is definitely not recessed on the LEs, and I don't remember it being that way on the 80s Ive heard either. What's your source? The 80s tend to sound a little hollow without amping IMO, maybe you should pick up a cheap amp like the E6 or E11 to see if that helps. Seems easier than selling your 80s and/or buying the LEs.
I love my DT770s 80s. Are these that much better? I read the headphonia review and it seemed, at least a little, that maybe the changes had to do with the different pads. Could a pad swap on the 80s make a huge difference. There isn't all the much I'm unsatisfied with on the 80s, they only compliant I have is the mids tend to get a bit muddled at times and high and mids can be recessed