Guys JT doesnt want to be here, he is mentally spent in Sacramento. He needs a change of scene or else it will be another season of JT on pins and needles. Landry is Vivek era King who will be chomping at the bit to have a bounceback season and live up to his contract. Landry is staying over JT, and will be here unless you are getting a good piece.
But he can't under those circumstances. That's the problem. Its sorta Petrie thinking. You can't just stack 10 offensive players who use the same space, or 7 of them are wasted, don't get their shots, and never were good at the other things. Without Josh Smith, and with for instance Larry Sanders, Landry makes sense. There is a second post scorer hole to be filled, shots to go around in that scenario But once you add Josh Smith...well the starters are strained to breaking for shots, minutes for backups are scarce, and we have no size outside of Cousins. That's when JT and Reggie begin to factor back in as appropriate reserves.
Think of it this way. Josh Smith averages 35min a game. Cousins was up to 33 last year, and hopefully can get to 35 himself. That would leave about 26 total minutes for all backup bigs. In order for Landry to even have a chance of making an impact, he'd have to eat almost all of those backup minutes. Which means 3-big rotation, with Landry, an offensive player, constantly out there with either Cousins or Smith, also offensive shot munchers. And when he was out there with Smith, one of them would be playing center. Not good.