Hello,
I tried to respond as best as I could below;
1. I can't locate the plugin but I tried a simple scenario where I included the condition to increase lead score by 100 per form submission and logged my sales ready score as 100. Then submitted a form and a few hours later my lead's sales ready flag was set to yes.
2. Making the lead sales ready doesn't change the ownership of the lead unless there is a custom workflow for it.
3. Yes views make sense to distinguish types of leads
4. There is no integration between processes so users need to manually switch the business process in this case.