While a reduction in difficulty may result in increased player count, at least initially, it doesn't improve any part of my gameplay experience. I've never cared how many other people play BLM, I played it because it was fun. Trading the fun for more players isn't a gain.
What you said on class engagement vs encounter engagement is true to an extent. Though BLM was already a simple class in the first place and it feels less like it was adjusted for the sake of encounters and more like it was sanded down to remove the class engagement entirely.
People are going to have different opinions of course and that's fine. What isn't fine is upsetting one group to please another. Maybe what SE needs to consider is a wider array of content instead of trying to generalize everything.