Yep, everything you said I couldn't agree more. So it will probably improve more for you. Regarding the bass as being "punchy and thumping", this was very coincidentally as I was playing The Crew 2 while listening to rock songs. Some tracks, when they ask, they bass can sound powerfull, it's like you can
feel the bass. When that kind of bass is not asked, you won't experience that. The 109 is indeed not a basshead heasphone. The real basshead headphone is probably the Tygr 300R.
There may indeed a LOT of better cans out there than the 109 but are they?
This hobby is entirely subjective. Some may love the €5000 Focal and others may hate that €5000 Focal. And not to mention the giant leap in diminishing returns. So yeah, unjustifiable. But even if I rob banks or scam people around with NFT/cryptos that made me a billionar, I just won't buy headphones starting from €2000 all the way to 12K. I mean, I only buy headphones because of the specs, tonalities, how it sounds and not buying them by looking at the price tags and be like "damn, that headphone costs over 9000 so it must be very good!!"
And the funny thing is, I really wanted the Liric but because all lot of owners have shared their experiences on how it does sound, it's not for me. So yeah, you buy headphones that does sound good to
your own ears, not by looking at the price tags.