The simple & obvious answer is to remove Exploring Lucania, as that's what introduced the game breaking crap.
Just turn that into the 3 scenes with each new person's introduction. Remove the contract mechanic from it, entirely.
The bugs issue is more complex than that though.
v0.07 not only introduced those 5 Wilfred's contracts, but also the Ombra gameplay contract with the main story "What is truly weak is truly strong."
Sure, it wasn't as much as the Exploring Lucania gameplay release but v0.07 was when bug reports started coming in due to gameplay.
And this continued with v0.08 when Hopes released the Gracie missions gameplay. Despite Hopes and his coder doing patches to quash the bugs, they still got occasional bug reports from some people (non-android) not just here, but also in Hopes' discord.
Yes, it really blew up with v0.09.5's Exploring Lucania gameplay, but contracts gameplay (esp. main game) has been a plaguing issue of getting buggy since its inception; so attributing it all to that one Exploring Lucania part, is well..... quite understating the whole issue.
Now, don't get me wrong. I do quite like the current gameplay in contracts myself and I myself never experienced all the bugs etc that I saw other people reporting (nor am I advocating in any way of the gameplay's removal. Having said that, if Hopes wishes to change the gameplay into something much simpler, I'm not against it as long as he keeps consistency of what's in season 1 throughout all 3 seasons of DeLuca).
But even so, when people say game has become quite buggy since the contracts gameplay of v0.07, they're not really wrong in their statement.
Also, not like those 5 Wilfred's contracts are bug-free either; remember those 9999 Fedoras, 888 Bulletproof vests, and 77 trousers?
Iirc, I don't think that bug is fixed yet, among maybe one or two small bugs in those contracts.