Add Boss to get to level 11 ... Instead of the big wait
Your last post said you were improving the game to "look" better on steam. Unfortunately you are rapidly losing players and your support base; you know, those who would buy additional content.
My suggestion is to add (1) REALLY difficult boss quest that will allow players to level to level 11. Four difficult encounters then a nearly impossible big Dragon or such. Something that will take a lot of skill and no small amount of luck to pass. Maybe a couple of appropriate (and existing) item drops that are needed to complete the quest.
This addition would utilize existing art, tools and code, and an intentionally unbalanced boss.
This will rekindle interest in your existing player base as well as keep us happy and grinding away. Minimal investment, great payoff...