Fairly sure the philosophy has remained the same with him: Draft skill and IQ. UFA and trades for size. Pretty sure that is how he said it in his opening presser.
Contrary to popular belief, he has never had an issue with size. He's even overpaid for size (Foligno) and his first big trade was to acquire Muzzin. He just doesn't like size that can't play or skate, and he is not going out of his way to add size (i.e. icing a worse lineup just to get a guy with size in the lineup). In fact I am fairly sure even in his Soo days he was pretty big on size. The first guy he ever drafted was Darnell Nurse and he followed up with Jared McCann the next year.
He also recognizes that being tough to play against has multiple meanings. Guys like Kerfoot and Robertson may be small and won't run people through the boards but they are still very hard to play against because they work hard, are very smart, and can be strong all-around players. Can't have a lineup full of them but you definitely want them in your lineup. Or you have guys like Hyman and Mikheyev who are an absolute handful even though they won't punch a guy out.