I'd take Atlanta's roster any day of the week over the Mavs roster if you took Luka and Trae off the teams. Not even close even with the additions of Washington and Gafford
The Best player after Trae and Luka is Kyrie and it isn't close. I think Kyrie is better than Trae.
and the next 5 players after that are all Hawks. And Kyrie misses a third of the games.the Hawks have a significantly better roster than the Mavs
Who are they?
Murray, Capela, Bogdan, Johnson, Hunter. I think you could even make arguments on Bey and Okongwu.
Dallas' roster just isn't very good. Very poor defensively and not a single well-rounded player. Even a guy like Hardaway who is supposed to be a shooter isn't shooting great (not horrible at 36.5, but he shoots over 8.5 a game, so you need better). The Mavs roster just isn't good. Gafford and Washington might actually be their 3rd and 4th best players, which is horrific. Lively looks like he could be very good down the line, but he is a super young rookie (which is part of the reason they brought Gafford in).
The Hawks biggest issue is Murray is a terrible fit next to Young. Murray was the wrong guy for the Hawks to go all in on. The Hawks needed a guy like Bridges or Brown next to Young, not a lesser version of him.