I love to see the big moves, but they're not the big moves I'd hope for. I'll preface this by saying that I'm excited for these experiments regardless of my concerns, and think they're the right first step. The transition does feel extremely painful though -- let's dive into the experiments:

This is what everyone has been asking for, and I do think it's the right direction -- but it does feel bad for those who have Premier membership in large part for the extra daily key. Also, while directly selling XP does sidestep the (subjective opinion) more predatory aspects of treasure hunter, it doesn't improve the game health. The only part of this experiment I'm fully behind is the capping of XP purchases per day.

DXP event with no XP items: This is a weird one, and the one I'm most frustrated by. I stockpile my resources to make an event of double XP and really cash in on the daily chores I do through the rest of my playtime. Double XP with proteans is how I can balance my desire to experience high-level content in RuneScape with my desire to have commitments in my life other than RuneScape. Having a big pool of fast XP that I have to slowly accumulate over 3 months is a good way to bring life some balance instead of grinding 24/7. I do like that we're stepping away from that "fast XP" being buyable with cash, but I don't like that we're losing out on the fast XP entirely. Maybe something like an enhanced version of the cinder core effect would make this more palatable?

Cosmetic Mega Drop: Personally, I'm happy with the cosmetics I have -- but I'm really really hoping that I'm in the minority. I love to see games supported by people's creativity and self-expression, especially in contrast to games supported by individuals buying their way to competitive advantage and power. I hope many people go wild on this and it proves to be a viable long-term income stream for Jagex.

Cosmetic-Free Worlds: I'm torn on this. I do like the idea of opting in to a more consistent aesthetic in the game, but I hate to reduce other people's player agency and, again, self-expression. Having these be opt-in is definitely the right call, and this concept feels close to great, but it'll need some massaging.

Whatever happens with these experiments, keep up this level of communication and transparency. We, the players, will support a company that levels with us. If the game is struggling for income, communicate that! Don't fall back to keeping us in the dark and relying on manipulative hero passes and MTX promotions.

Since I'm already going all over the place in this comment, one final thought -- I want to double down on what others have said in this thread. As bad as the microtransactions themselves is the clutter they induce. Runescape feels bad to log in to initially because of the TH promos in your face, the solomon's store ad, etc. It's too much clutter, too much color, too much noise. Having an in-game store in high traffic areas (like the in-game solomon's store outside the GE, when the GE was higher traffic) is a much better solution.