I say to need to get rid of everything under "Hello" link. It's pointless and confusing who you're talking to. Everything else is good.

Well that's just a lazy coding work. But it could be "We need this website running till lunch!".

I use sketch for design, but I also use Illustrator all the time. It's the best tool for vector graphics. The are examples of people making icons in sketch, but it's like that video of designing iOS7 in Word.