Eek. Sounds like I'm going to give them a pass. I already found the T1 2nd gen way too mid-forward with a rolled-off treble. Anything darker is not for me. I suspect the T5p 3rd gen will follow the trend of the T1. Thanks for the impressions.
I never found the T1.2 that mid-forward in fact it's a bit recessed imho, especially compared to an HD 600/650/660 S. The T1.3 seems to shift more in the direction of the Senns in terms of tuning.