I don't mind pixel precision, just as long as there isn't too much of it in a short amount of time. It's kind of like the occasional hidden trap, where I don't mind it at first, but put too many in a row then I will mind. Interestingly enough, I don't remember a lot of the Psycho levels having a lot of it when I did my LP of LPI near the end of last year. However, as I mentioned before, the Psycho rank is a huge step up in difficulty from the other ranks. In my experiences, I found a lot of the early Psycho levels harder than many of the later ones.
Anyway, I've taken a look at some of the Psycho levels that were mentioned, and here are my findings/assessment:
Psycho 2 - Yea, way too much precision needed with a very unforgiving timer. I think I remember finishing with just a second to spare in the New Formats NL version, although I ended up using a lot of RR manipulation. Since SL's timer is faster, I think this can definitely do with reducing the lemming count.
Psycho 5 - Hmm, seems a lot easier to do on SL, as I'm seeing the same thing as Turrican did with the bashers, where you can get through the OWW much faster than you can on NL due to them getting interrupted and walking up into the wall each time. In a way, I feel a fix isn't needed, as I have a lot of bashers leftover, though I think technically it can be tweaked to maybe save an extra or two with them. Replay attached.
Psycho 8 - Most definitely very little room for error, as I recall in my LP of LPI. From what I remember, in my solution the final builder hit his head at the last split second moment and just barely made it over land. I think I'm definitely in to reduce the precision here.
Psycho 16 - Regardless of whether the level is impossible or not (it's been proven possible), the easiest fix here to reduce the precision/difficulty needed is to simply shorten the length of the lattice section.
In regards to the NTTD levels, the timer is super tight if you allow it to be. My replays here ended up with some time to spare, so therefore it is possible to finish either one with seconds remaining. In particular, I really cheesed my way through with Part II, not even using the bottom right half. Really, they're solve in any way you can.
For Psycho 24, as I said before the best I was able to do if taking the intended route is 14 instead of 15. I don't mind whether the backroute I found is kept in or not, although TBT I lean towards keeping it in just because it's not that much easier than the intended solution. Still, your call, not mine.
Once again, I'm still on my hiatus from the game, so not really seriously playing Lemmings, especially since I've already completed LPI a few times and hence it's not really high priority for me
Also a reminder that if you want you can possibly wait for the next SL update to drop before the next LPI patch, as everything will need to be rechecked once it does anyway
At the same time, who knows when that will be.