Talk of Clyne going is premature given Liverpool have had a bid rejected and he has made no inclination of wanting to leave, but I can't help feeling that Schneiderlin is the man you need to keep. You made a very crucial decision in keeping him last summer - and a defensive midfielder is so pivotal to any team these days - you simply can't afford to let him go.
You allowed Lallana, Lambert, Lovren, Shaw and Chambers to depart last season, but Schneiderlin stayed and for good reason. You need to keep hold of him this summer, too. Clubs will sniff around him, but losing him will be extremely detrimental to your growth as a club, squad and first-team.