OT; That feeling when you pay $1000 on computer parts to play a game you payed 7 dollars for and it still lags in places. Does it need optimization now? No. Later? Yes.
While I will say, this is a very nice a attempt at something other then a part or plugin; it feels like this mod wasn't "MADE" for KSP. I feel like it needs more testing though. I do see this getting better later on.
Windows 7 64 bit AMD FX 4100 (Quad Core) 4.2Ghz 16gb RAM Geforce GTX 560 Trust me, I even get lag, but that's only during loading. They should be adding loading screens in one or another update if I'm correct; but that is a long ways off.
A direct intercept would require a bigger rocker and more fuel. It's more efficient to do interplanetary orbits around Kerbol, like you would from Kerbin to the Mun.