Finished putting Zealios onto my Filco. The alpha rows each have different weights for comparison (bottom 62g, middle 65g, top 67g). Quick review below:
The good thing is that the tactility and smoothness is everything I wished for. The 67g gives me an experience that is the closest to 55g topre I've had on a non-topre switch. The large bump fills almost entire travel distance which gives a similar experience to a topre dome compressing.
There are two problems, though, which annoy me to the point that I would actually prefer to use any other of my boards with Cherries or Topre instead. First issue is the wobbliness, which others have already mentioned. The switch stem wobbles enough to give the entire build a very cheap feel, like I'm typing on something that's going to fall apart any moment. Second issue is the bottom out, which feels every so slightly spongy and muted. I like to bottom out when I type and for me personally, the sharp clack of MX's is a part of the whole tactile experience, just like the actuation bump is and I want my bottom out to feel sturdy and solid.
I've tried several different caps on the board - SA, thick Imsto (cherry-profile) PBT, GMK thick ABS, thick OEM PBT. Due to the two issues above combined, all of these caps lose some of their quality feel when put on the Zealios board, compared to another same Filco board with Cherry switches in it. I would try a cap on Zealios for a bit in think "that's kind of alright", then put the same cap on a Cherry switch and be like "oh wow this cap is really nice". Yes, the tactile feedback and smoothness is sublime and that is irreplaceable and cannot be reproduced on any cherry switch, but the wobbliness and spongy/muted sound kind of overshadows the whole experience.
Props to Zeal for innovating and developing something new and unique, but as of right now, for me personally, the negatives outweigh the positives. I hope this development will not stop here, and I'm looking forward to potential Version 2 in the future.