I like @Chewie’s suggestion to use TrainNow for sprint workouts. I also think they’re probably correct that the weekend/club ride you’ve got listed there isn’t strictly Zone 2… unless you’re riding with some really disciplined folks! 
If the club ride is harder than Zone 2 pace, you may only need one sprint session instead of 2. That’d give you 3 days of intensity each week – 1 sprint workout, 1 VO2 workout, and the club ride.
The rest of the week you could fill in with Zone 1/2 riding.
Time Crunch 45 might be a funny name considering you’re looking to ride 8-10 hours per week, but if that’s the best fit, I don’t see why you shouldn’t follow it! You could also adjust your plan’s custom workout duration if that would be helpful to get you closer to those 8-10 hours per week you’re aiming for.
Hope that helps – feel free to let me know if you have any additional questions!