I took one for the team.
Recently re-bought Liric and I think it's even more comfortable then I remembered. Also bought a pair of the Dekoni pads and swapped pads an hour ago.
Stock pads a softer, fit like a glove, sound amazing but are horrible with sweat (pleather).
Dekoni pads are firmer, feel like any other Dekoni pads and made of leather.
The swap is almost always irreversible. The chance that you destroy the glue/sticky tape layer of the pads is nearly almost guaranteed.
On to the changes!
I had to re-adjust the fit. Dekoni pads are less thick, the result is that the rods are less extended.
Ah the feel of leather! I prefer it over pleather any day of the week but respect other opinions.
The FR is changed but not overly dramatic. Here is my EQ using de RME ADI-2 DAC:

- Add some sub bass, but the difference in bass presence is
less then expected
- Add 4dB at 4khz to bring back some of the missing upper-mid presence
- Reduce 2.5db at 10khz. The dekoni pads add more presence there.
These changes are done based on the FR on Dekoni's site:
Are they worth the effort / destroying the OG pads? I would say: no. So far I readjusted the FR to have it more in line with the OG pads but without the extra energy around 10khz was not to my liking. Comfort wise both OG and Dekoni pads are above most if not all closed-back headphones.