Just an update, I have learned a lot about this switch since this post, and I have come to the conclusion that the inconsistency in this switch is inherent to the switch, and that the switches will inevitably age toward a weaker click and tactility. I have tried all the tricks to increase tactility, and the only thing that gave any results was desoldering and resoldering, and I think it is because it causes the metal to expand and contract and it partially restores the original bend of the 'foil tactile dome'(I don't really know what to call it). Pressing the switch past the actuation point also seems to temporarily help on some keys, but it doesn't last long. Also, it seems that the click seems to fade when keys AREN'T pressed instead of the other way around. For instance, the vowels all have the loudest click and most tactility. However, the less common vowels have the most. The letter Y pings like a model F.
I also just pulled 6 of them off the drying rack after a sealed ultrasonic cleaning, and the difference was negligible. Ultrasonically cleaning them, at least when sealed, seems to do basically nothing, however, the bath was quite nasty after the cleaning, so it did do something
