it will probably change as more things are added, but for now it feels like you get a full set of gear, and then most of the quests become "do the same thing more times" e.g. deal total damage/kill enemies/get gold etc... which all have the same solution of "spend time in a stage"
maybe it's because stages are fairly empty (with the blood altar in stage 1 being one of the only things to do.) but the progression doesn't feel impactful, like you complete a stage you get barely enough for a blessing, you have to play like 2-4 times 30 minute on the same stage just to get 1 item that you may never use.
maybe I've been spoiled by vampire survivors where early-mid in the game you get like 2-3 new things to play with (character, skills or maps) basically every run, but it felt like a better pacing.
I feel like maybe quests that are long would be better split in like 4-5 shorter ones which add up to the same (e.g. deal a total of 1M/5M/20M/50M/100M damage), because I'm basically having nothing and then completing 5-10 quests at once with only like 2 that was something I was actively doing.
tl;dr: I'm not sure if it's the impact/novelty/frequency of the rewards or the way they are gotten, but the pacing feels off.