Hello Wadeck,
let me answer here for Dheeraj (as mentor of the GSoC project).
At the moment, we don't have any probes in actions and we don't have a lot of data. I know that we have for example, 52 plugins out of the 1872 currently in the update-center that don't have any SCM link. Out of the others, some don't have a valid SCM link as well. We still haven't implemented anything that could tell us which is the parent pom version used by each plugin, but it is in the plan.
The plan here, is to get a sense of what make sense for the community, but the weight of each rule will have to evolve with time. For example, if we say "having a Jenkinsfile" is very important, but in 6months we have all plugins with one, then we can lower the rule (new plugins don't come often) and just have a warning if / when the Jenkinsfile disappear.
Same thing, for new probes, we don't intend to have all the probes in September and be done with it. We want this project to serve the community for the years to come. So, the probes and weight will have to evolve with the community.
I know I haven't answered your question specifically, but that's the best I can offer you.
-- Adrien