Not only was the hotkey switching issue fixed, but it looks like switching across-the-board has been upgraded with lower latency. Fantastic change. Vets get to keep their tech, and everyone else gets to enjoy faster, more responsive combat. Thank you for handling that swiftly.
With the latest round of Spiked HP adjustments and Mandolin buffs, I agree that this update feels sufficiently refined and built-out to push to live. There's a few more things which could maybe use further tweaking, but overall I'd be happy to have this content deployed to the main game as-is.
Everything with the spikes and Mandolin is pretty solid now. I'd be happy to see them implemented with their current iteration. Spike rates and buffs are good, Mandolin is nicely balanced.
Two things:
Mandolin shots collide with your knight if you are frozen, so you can't shoot it. This seems like a bug.
Some sort of visual signifier on level icons where spikes can be found would be great, as others have mentioned.