After mulling over it for a day or so, I decided to take the plunge and upgrade. I will be ordering the i9 with 32GB RAM and 1TB SSD, a config that I hope will last me many years.
Yes, despite a few minor gripes I am excited to get it, and why shouldn't I be? This upgrade was one of the most solid ever, and undoubtedly the biggest performance leap in the last 6-7 years, very well worth the wait. With the jump to 4 and 6-core CPUs, the RAM bump and the keyboard revision, the 2018 model addressed many lingering issues and delivered a performant, up-to-date professional machine.
TouchBar, ports and overall form factor are still the same, yes, but a redesign was not in the cards anyway.
The only letdown was the shoddy Polaris GPU rebranding, but I have come to expect very little from the MBP in terms of graphics card performance, so yeah, bummer but it won't hold me back from upgrading. The GPU isn't a selling point of a Mac for me, since AMD cards can't use CUDA acceleration in any case.