Yes, that's probably the answer - but how long dod he have on his olld contract? He always had the option to play up and force a move; probably Lallana advising him to sign hs new contract (booo !) clinched it!
Plus, of course, a several £million a year pay rise!
Hmmm - not sure many people thought that at the time. Mind you, we all knew he was a good manager then, and doing a great job at Brighton - an opinion that has later been revised!