The problem, for me, is the reds are not tactile. I'm giving these silent reds a good, honest, try.
I am a very fast and heavy typer. I type all day for work. I am missing the tactility. That is why I will prefer the Zilents over the reds. For me, silence is the most important part as my typing with Browns really annoy my wife, and my teammates when on teleconference. Zilents provide tactility, but are silent on the press, the bottom out, and on the return. Due to slight cusioning built into the stem. And I don't find them overly mushy. Not nearly as mushy as placing an oring. I think the Zilents are quieter on the return than my silent reds.
If you like silent reds, you should give Healios 63.5g and Sakurios 62g a try. These are not actuation force spec, but bottom out spec. They are close to silent reds.
You are mistaken about the keycaps on the MF 108 V3 being double shot PBT. They are double shot ABS. Just look at them and feel them next to a PBT keycap. It's obvious they are ABS. If there is any doubt in your mind, you only need to consult the manual that came with the keyboard. First section on first page. Bullet point #3 reads "ABS double shot keycap". I find the font to be not pleasing. Especially the "O", "D", "B", "4", "6", "8", "9", "0", "Home", "Del", "PgDn", "F6", "F8", "F9", "F10", and Shift keys.
The stabs aren't too bad, I agree. Like I said before, I don't anticipate needing to replace all of them. They do need to be lubed. On mine, the space, keypad enter, keypad +, and backspace need some tuning.
I don't think the zilents are hoopla. They fill a good niche. They are tactile. They have 4 options for force that allow you to pick the one that's best for you. Allowing you to pick keys that don't accidently press while your hands are resting on the keyboard, and yet to not provide fatigue. You pick the weight depending on how heavy your hands are. And they are very quite.