In what ways is your new machine better, apart from being thinner and just a bit lighter?
Performance is better across the board (6-core i9 vs 4-core i7, 32GB vs 16GB, faster SSD). It has a larger, pressure-sensitive track pad. The display is better.
I have a slight preference for the old keyboard, but I don't dislike the new one. I could take or leave the TouchBar. I was never a big user of the F keys and IntelliJ, where I spend a lot of my time, has good TouchBar support. I like having Touch ID. I'd prefer to have a real escape key, but the button is still in the same place so I haven't had to retrain my fingers to hit it.
USB-C with a Thunderbolt 3 hub is marginally more convenient than a Thunderbolt 2 hub plus a MagSafe power cord. I do miss MagSafe though.