Since when did this hate of 3 note chords come around???? I don't mind them as long as they are OMFG LOL CHORD RAPE like Stricken in GH3. Seriously, that song is the WORSE official chart I have every played in my life. Most power chords that I play are 3 notes anyway (root, 5th, root).
The random picks makes it more like you're playing guitar. You pick the notes the guitarist actually picks (unless it's not feasible to do like the part in that solo like looks like the mosh from Raining Blood).
No ethernet port anywhere near my 360 (my wireless router is in the room/closet my washer and dryer are in.) and I sure as heck can't spend $100 dollars for a stinking wireless adapter.
If you have a laptop, you can hook it up to that and share the internet to your xbox. I do with mine. There are tutorials on the interbag somewhere if you look hard enough.