Xan you actually have a great idea there.
The only flaw I find with Big RR is when, for example, your turn ends right before you can finish a really really long climb(it does happen often), and you fall down, completely wasting sometimes 20+ seconds...
That right there, is bulls**t, however, with this idea, give players maybe 2 bananas, which gives you like an extra 5s, or something, it could help here and balance the game more.
Not saying use it in this Cup, I just think that's a genius idea, i'm personally going to start using that in Big RRs.