Some very valid points, and welcome changes.
However, SE may have also learned to be more careful when people start saying they want "harder content" because while only a small minority of people actually want genuinely hard content, a larger more vocal group are only saying they want the hard content but what they really wanted was something no harder than Titan HM was in 2.0. Difficult, but not impossible.
I will disagree that it was the raiding content that drained the smaller servers because people transferred to other servers, however. I think a lot of the server drain was simply because people stopped logging in. Final exams and Fallout 4 took precedence. I had more people log in last week than I'd seen since before 3.1 came out, because they were finally ready to dig into 3.1 content they'd been delaying.