Yes. But not all Machine Learning (ML) is LLM. Machine learning refer to the general uses of neural networks while Large Language Models (LLM) refer more to the ability for an application, or a bot, to understand natural language and deduct context from it, and act accordingly.
ML in general as a much more usages than only power LLM.
I'm not sure what you mean by "low effort"? OSRS is an incredibly good game and keeps getting new content all the time. I'm happy to pay 15$ a month since we get a free update every wednesday. Sometimes it's just some hotfix , other times it's a whole new boss or continent. We had an new part of the map just last week.
Yes there is bot, but I never felt like it impacted my gameplay other than lowering the price of some items. The team is also doing a lot to ban them, it's getting much better.
The community is booming. If you look around on YouTube, there's a lot of content creators doing awesome thing on OSRS: custom game mode, weird twist on existing challenges, documentary, etc.
Honestly, I think we are currently in the golden age of Old school RuneScape, and if you feel like the game is bad or low effort, it might not be for you, which is fine, but the game itself is not the issue.
I hope you find some other game to give you what you had with RuneScape back in the days !