I am of the same opinion. From what I have seen, the drivers only activate KERS when exiting corners once the traction was established. Additionally, if what I see from Kimi's display during Q2, cars are rationed their alloted amount of KERS energy at the start of each lap, on the start/finish line. If so, then the drivers would use the KERS in short bursts each lap. The KERS charging system would always replenish the energy storage devices to 100% at each braking opportunity. And the KERS control system would monitor how much is available per lap session, and distribute it according to the situation. For instance, near the end of a lap the driver may have used up his ration for that lap. But the KERS control system would be aware of that, and not deliver anything if asked, even though the storage devices would be at 100% capacity. This is all, of course, assumptions, but to me, the way they are going.
So if the storage devices would always be topped up at each opportunity, then it's reasonable to question their capacity. Maybe they aren't as large as first assumed. They don't have to be able to contain the entire 400 Kj, maybe half that. Smaller batteries or not as many flywheels. They would still have to deliver lots of amps when asked, so to me these are very interesting batteries.
I think that KERS is presently unsuitable to be used in one long push, as in the case of a very long straight. Instead, the KERS will be used to suppliment acceleration out of corners where it can be used. That should lower average lap time, yet not really have the ability to give some kind of overdive where a drive could just plain speed by another on sheer speed. It will be used to harry a car in front, and jump on any slight mistake. That's where KERS is going to have an impact. Setting up a pass, and taking opportunity of whatever occurs.
There's another KERS related subject, the increased pilot workload. To use this system, the driver has to press a button whenever he wants that extra kick. The driver is already having to deal with many things already. Not only driving the car, but adjusting brake bias, differential, and others. The drivers who are comfortable doing all this multitasking workload will be the drivers who consistently succeed.
A proud Canadian, and yes, HOCKEY is our game.