I'd actually like to see both a slower and faster setting available for fishing.
When I'm using a mouse or tablet/pen, I have no problem hitting the splashes as soon as they happen, and it's a drag waiting for the next. But using laptop trackpad, I've missed several fish to the point that I won't be fishing without a mouse again because I can not physically drag my finger across the trackpad with enough speed or precision to click the splash before it's gone.
And I don't have any sort of mobility or reaction time problems!
In terms of accessibility, I'd love if there were options for fishing speeds:
Quick reaction time: 10 splashes in 45 seconds, but they vanish slightly quicker than they do now
Normal reaction time: 10 splashes 60 seconds, what we currently have
Slow reaction time: 10 splashes in 90 seconds, and they last slightly longer than they do now
There would be no benefit to number of fish you could possibly catch, nor would this effect how often you could go fishing, and would allow you to tailor the game a bit more to your actual physical/hardware limitations.