That actually makes sense.for the record I like the 5 as is...it is a different sounding HP than the TC and susvara and sol p but thats good not bad....the idea of trying to adapt all HP's to a certain curve or sound might work for everyone else but not me...I too had the 4 and used the roon audeze setting and it was fine but nothing that made me stand up and notice....it was at best a marginal difference I am not sure if it was better or worse...when I want a bass heavy presentation...when I want something more laid back I listen to the susvara...when I want a spacious open and incredibly detailed listen I turn to the sr1a...I am lucky enough to own several TOTL HP's that all have different characteristics and strengths and weaknesses and I like it that way...more power to everyone else
I suppose EQ-ing is an itch, and when you scratch it, it's fun, and if you see improvement (relative), all the more reason to keep scratching it.
I didn't care much about EQ for any other headphone. Like I wouldn't dream of EQ-ing an SR009S, lol. I just find it pristine and perfect with its imperfections.
All that said, the 5 for me did improve with EQ. But I respect those that do not care to EQ.