If the option is between him and keeping Hemed, then I'd always choose the latter. In no way is Bamford the striker we should be setting our sights on. Wouldn't even be happy with him as our fourth striker option.
Hope not. He hasn't been able to cut it at Palace, Norwich, Burnely or Boro at that level and there's been little to suggest he could with us either. Expect we'll sign a striker for next year whatever happens, but would suggest its highly likely to be one we haven't previously heard of from abroad.
Karanka wants him to return to Boro also according to their local press:
http://www.gazettelive.co.uk/sport/football/transfer-news/chelseas-patrick-bamford-welcome-back-12456030
Ryan Bertrand and Michael Keane? Both aren't with there original clubs, but both have done the Championship club loan(s), Premier League club, England first team contention route.