Ramires is close to signing a new contract http://www.telegraph.co.uk/sport/football/teams/chelsea/11697398/Chelsea-news-Ramires-starts-talks-over-new-deal.html
Because there's no many Premier League teams which will take a young inexperienced players on loan and play them every week just to prepare them for another team. Vitesse getting better and better with every season, and they can offer Europa League football. It's not a bad place to progress. I would say it's a good place for young players.