Let's sort your issues by the order you listed them, so you completely understand WTF is going on:
- That "fix" is for the beginning of S3 where when folks that had used that other mod got crashes during the opening dialogue between Tommy and Jacob (there's many posts about it in the VN's thread and this thread as well, here's one that shows where that scene is). So, yes, it does fix something, it just doesn't fix all the fuckups folks may or may not have done, it fixes specific issues ALL players had when using that other mod previously.
 
- The loop issue has been addressed a thousand times. It's all due to using the "harem" feature of the the other mod. That's on you, not me. How is it my responsibility to sort that shit out when I had zero to do with it? If you wish to import my personal routes (all routes are available) that are completely free of any other mod or shenanigans then see the post here and follow the instructions EXACTLY (including the backup process so you can revert if desired later to your original fucked-up import files).
 
- I have no idea what any other modder does or doesn't do. You'll have to address that in those particular threads. I don't work in collaboration with anyone except VN developers, period. I can't help you with point #3 for that reason.
 
I hope that sets some of this straight. At the end of the day you can take your aggravation out on me all you want but it won't fix anything. I had nothing to do with all these hundreds of folks with fucked-up save files and import files. That's solely due to using some other product which I have zero control over... so I feel it's complete bullshit that I have to keep addressing the issues repeatedly of all these things that have nothing to do with me or SanchoMod, and certainly aren't my damn responsibility. I'd think that some folks would be grateful that I've provided dozens of fixes for all these other mods and hacks that they've used in the past. 
SanchoMod itself has NEVER left anyone high and dry on any VN I have in the public catalog. I don't fuck around, I take all this very seriously... both my time and yours.
Regards. I now need a Crown & Coke refill.... a generous one.
		
 
		
	 
- Hmm... I am tempted to try your solution with your personal routes. I would need to know what routes did you make there? Probably no harem, ok if that creates problems, but is there a Maya & Josy route? a Bella, a Jill, a Sage and very important, is there an "Others" route?
- For the moment i downloaded the saves from the OP link 
https://f95zone.to/threads/being-a-dik-v0-7-0-dr-pinkcake.25332/post-5618683 for use in the next update. Could i import those routes if something is missimg in your routes? I am mostly interested in the Bella route which was made so (as alternative) in those saves that it may fit to a further development into a MC/Bella/Jill threesome ending if that will happen. Is a similar route among yours too?
- A problem i see is that i made a lot of saves already with your mod on and my own imported routes which routes were all made with the scrappy mod. So if i click one of those saves by mistake, do i fuck it up again? I would delete those saves but I don't know where they are and clicking DEL on each one would take ages (if it even worked)
- In what order do I have to do it? Install v.91 again, then your mod, then backing and replacing  BeingADIKSeason2Transfer1366998845 or your mod as last, after replacing?
- Can I use the Gallery Unlocker from here: 
https://f95zone.to/threads/being-a-dik-gallery-unlocker-v0-7-2-oej.81203/
with your mod? I know you have a gallery in the mod but as far as i have seen, your gallery is not unlocked, it seems I must first play those scenes to get them in the gallery. Or did i miss some button to unlock them in your mod?
Sorry if i went too hard on you but i understood that so that if i click that "fix" thing that would fix everything in my case where i imported saves made with the scrappy mod..