I understand the stream quality was low but it was still a good indication. Not just the graphics but everything. The music was lacking and absolutely terrible, the ui looked worse, the ai might've been on rails - they weren't fierce, the sounds lacked punch, the guy streaming refused to show the cockpit view after numerous people asked, etc., imo Forza Horizon 2 just looks more ambitious.
Having played the hell out of Motorstorm and Motorstorm: PR, I am not worried about the AI lacking tenacity. Evolution games tend to be very kind and snuggly at low levels (where this guy was playing), and controller-snapping hard later on.