I have now discovered, after a few days of joining, that 10 ripples appear in fishing… every… single… time. I don't know about fishing levels 12+ quite yet- so correct me if I'm wrong. But, I think it would be TOTALLY cool and exciting to have a very rare event happen during fishing where maybe 5-ish ripples appear at a time. That way you get surprised and it's a nice little break from waiting for one (or the rare two) that are expected. Obviously it would be very difficult to click all 5 of the frenzy, per se. But that would be the point- to excite (and add variation) and possibly pick up another 1+ fish every now and then (if you are fast enough).
As it sits, after observation, each 30 seconds is a mandatory 5 ripples appearing. So it's just a little bland and leaves me aching for a random variable.