Sprint Tri vs a Quick Brick workout 1 week before race

Is your race a sprint or an olympic distance?

Well here's the deal.  Your hour brick in your training plan says to do the brick at race pace.  Doing a sprint triathlon at full effort, like it sounds like you are talking about, is NOT race pace for an Olympic distance triathlon.  They are paced differently. (yes, there are people who will tell you that a sprint is not paced at all and they don't know what they are talking about)  Your plan wants you to do what you feel your race pace will be for your Oly race, for an hour.....good plan for where you are in your triathlon "career".  It doesn't want you to race a sprint for an hour......2 different animals.

If I remember right you have decent potential but haven't been doing triathlon very long.  The plan you are following seems to have served you well up to this point...I'd stick with the plan.....especially if you want optimum performance for your Oly. 

I agree, a bike mishap is far more likely in a sprint than a training ride.  

Mount and dismount around transition can produce a lot of carnage.  The stress of the clock plus a lot of inexperienced athletes.  A bike wreck, even a low-speed tip-over, can do damage to you, the bike, or both that may be hard to repair in the week leading up to your main race.