2) I'm a huge fan of debadging. Always have been. I only left my STI badge on both of my STIs. Just looks so clean
3) Nobody every really thinks negatively of swapping spoilers. Some like the look of the STI wing better than others. I personally like the STI wing or no wing at all (or trunk lip spoiler). If its what you want...then by all means, look into getting one. You won't receive negative feedback for it around here.