i personally don't see their D improving, certainly not with IT on the court now
they can switch on most things and have general size (not down low size) w/ Green/TT/Bern/Crowder and maybe Wade or JR, but then they need Love and IT for offense. And they have zero answer for any player w/ size downlow. Who's gonna hold JVal? or Horford? Giannis? if the pacers improve Myles Turner? Not too mention you can simply run the PnR at IT any time he's on the court and they by default have zero answer. It's been shown this year you can also simply attack Lebron on D, to make him tired and less effective and more TO prone on offense, age is catching up
I'm not seeing it, i wouldn't even bet they get to the Finals