Anyone who followed Grosjean pre F1 will know he has a lot of potential.
He never looked slower than Kimi last year.
He just had a poor season, I don't believe this garbage that he lacks spacial awareness or any of that crap. He lacked composure and I suspect he's learnt that.
He WAS slower than Kimi on nearly all the races he managed not to crash. On several occasions the team had to ask grosjean to let him through, because he was much faster and losing time, other times he actually overtook grosjean after starting further back on qualy.