Maybe,DS wants the best for DS,which is fine by me. Maybe he just misjudged the club with his demands,perhaps a large signing on fee.My guess is that the club value him less than he does,and would have sold him this Summer,but could not get a replacement in time.
IMO to a point. AK gets a pay rise,in return the club will now achieve a bigger fee for him,should he be sold,because of the length of contract i would also imagine his sell on clause has also been reset higher .