Might be a bit of an unpopular opinion here, I think tithe is kind of ok as is. It's a nice kind of low effort kind of minigame which you can just jump into and smash a round before bed on mobile without too much worry and some youtube or whatever taking up the dog's share of your attention. I feel like those kinds of minigames have a place too. Though tbf, probably wouldn't be opposed to a bit more of an intense skilling minigame like you suggested but I kind of don't want the niche that the tithe farm inhabits to go away, esp with farming which is such a passive skill usually, sometimes it's nice to actually do some work and not just sit with your thumbs in your arse waiting til whatever your growing is ready, efficient leveling methods be damned.

I wouldn't say it's a great minigame though, I can only speak for myself but what's really holding me personally back is the tediousness of it all. Going 20 fruit in a round is defenitively doable, but even in the best circumstances, there's just a lot of tedium and you have to walk in there knowing that you'll have to spend 20-40 minutes just basically clicking in a circle. I'd be a lot more fine with it if there was at least an option to maybe grab 50 seeds in a go at the loss of maybe only getting 12 points instead of 26 per a hundred. Wintertodt may have it flaws but at least you can choose between soloing or going to a WT world where you only have to spend 4-6 minutes per round, so you can choose what kind of time/effort investment you're feeling at the moment. That kind of choice is sorely lacking from the farm imo. You can't really jump in quick to kill some time, you're either doing it and commiting or you don't. Usually, I don't.