Wow, switching back to Lemmini after getting used to NeoLemmix requires some determination! Lemmini feels so crude to me now
You'll be able to solve the infamous glitch levels correctly though!
I know what you mean. It's like why bother going back to an engine when it doesn't have all of the great quality of life features that NL has. Well, the thing is I'm a diehard traditionalist when it comes to Lemmings, and I like to occasionally go back to Lemmini/Superlemmini to either play or revisit level packs. Meaning, classic 8 skills, time limits on every level, etc. I was a heavy Lemmini user for at least 6 years before I made the switch to NL near the end of 2019. Believe it or not, several months ago earlier this year I went back and did all of Lemmings Reunion on Lemmini despite how a lot of the later levels are especially very frustrating to execute

I first completely solved the pack back June 2017 and I've replayed it and finished it again a few times on Lemmini since. Yes, your Pimolems pack included. It's a great pack, just how many of the solutions can be frustrating to carry out on the engine.
The thing that especially turned me away from NL during those years I was a heavy Lemmini player was how levels can have an infinite amount of time, and I'm one of the few who doesn't mind time limits, especially as I'm a huge lover of numbers myself. I didn't get into level designing myself until 2021 though. Currently, they're all LDC levels, but I'm thinking of making my own level pack one of these days. I haven't exactly ruled it out, but at the same time I haven't exactly said I would make one as well. I still rather play and solve levels than make them, particularly since I'm not an artist. Never was, and still am not

Still, a future level pack from me is a possibility.