Mod Markos has definitely been an awesome influence since he joined.
I do want to jump in to give credit to the whole RuneScape team though. Sounds a bit corny to write that now I have, but seriously - from about December last year, the whole team has been building to this even pre-Markos.
We've been working towards a player-involved development future for a while now (our approach to Necromancy & Community Hitlist are good examples of first steps), but in incremental steps.
The missteps in the second half of last year were a real sign to us that we should push to make the full change in our development approach now, not incrementally (along with addressing some other areas like release consistency). Not necessarily our 'final form' on those fronts, but to the point where it is the norm.
We spent a lot of the early part of this year completely re-assessing how we operate RuneScape. A metric ton of time and effort was poured into bringing that together and pretty much every Mod on RuneScape was involved in shaping it. We always look to improve every year, but in my 4 years on the team, it was on a scale of review / re-think way beyond anything I've been part of here.
It was a lot of stress due to unknowns and not being able to talk with players while we were figuring things out ourselves (the whole team feels it when players aren't happy). But... the end result is what you're feeling now.
Markos joined us about 4 weeks ago and really brought it together to get us moving, along with adding so much important expertise. As Markos said, we have to deliver on this now. But I'm glad (it seems? I hope?) we've started off on the right foot at least.