The Raspberry Pi 2 is a great advance for most things, but I have to wonder if the sweet spot for BrickPi users isn’t the A+ (due to awesome power management), with the B+ in second place, and the Pi2 a distant 3rd (because it’s power hungry).
The Pi 2 uses even more power than the B+, and what you get for that cost is more memory and faster processing. Unless you are maxed out in at least one of those two ways while running your BrickPi, there is no advantage to switching, and a huge disadvantage, since any autonomous robot will be limited by power storage and consumption.
How many BrickPi users would actually see a measurable benefit from more memory and processor speed?
When I raised the advantage of the A+ for BrickPi use before, I was told that Dexter Industries finds the lack of ethernet on the A+ to be a critical flaw because of all the difficulty with using a wifi dongle.
That issue is real, but I suspect it seems more critical than it is due to a bad batch of wifi dongles. I replaced my original one and the problems disappeared.