There's enough electronics in this car...if BMW wanted to limit or prohibit something...they could.
They advertise a high reving engine...and they included launch control.
If use of either voids the warranty, then they should expressly stated that. Launch control has nothing more than a casual statement saying something to the effect that overuse "could" lead to premature part wear.
I'm standing by some other modification was done to this vehicle. Otherwise, I think the OP has a good court case.
2011 E92 M3
| Melbourne Red | Black Novillo w/Carbon Leather Trim | M-DCT | Competition Package | Premium Package 2 | Convenience Package | Enhanced Premium Sound | Heated Front Seats
2004 E46 M3
| Silver Grey | - Retired