Nice review.
The seal of these is increased with headband adjustment. They have low clamping force with no adjustment, but you may stick a pad from sennheiser headphones to the headband, so they will stop falling from your head and get better clamping force. It would look like that:
You may get a headband pad of sennheiser HD600 or HD650 on amazon or ali, they don't cost much.
It can be attached with a two-side sticky strip.
Lawton dampening applied on the driver housing "take away the oddest and most off time reflections that have hit the metal portions of the driver which will increase phase coherence and thus soundstage", as was said by headphone guru
fjrabon about 2 years ago. He has written a lot of great posts in this thread describing the mods and their impacts.
If you want to get deeper into that you may start reading with a post
there.