The performance pack on the MK7 GTI includes an extra 10 hp, bigger brakes from the Golf R, and an LSD that does it's job pretty damn well in my limited experience. Launching one can be tricky but from a roll with good tires you're in pretty good shape.
I have a JB4 from Burger Tuning waiting to go in which can adjust boost by gear and rpm. It also works as a meth controller if you get to that point. I also have a dogbone insert to help with low-speed wheelhop though that may be replaced with full mount replacements if it's not enough. Downpipe is sitting on the flooor next to my bed.
I like the six speed myself, but the throw is a bit long for my taste. I picked up a shift bracket for reduced throws and a weighted knob from Boomba. Reports from other users say it cleans up the shifting nicely. And yeah, the first time I had to reverse a VW I had to pull out my phone and google how to put it in reverse, never saw the push down bit before. I love it.