Dallas did made a great trio and usually when three stars get together that makes the whole league easier for them. One of the main reasons is that you can do fine during regular season with just two stars, that means you can rotate your stars and rest them and lower the injury risk during playoffs by not putting too much emphasis on their body.
Secondly, usually with three stars, other teams can't double team anyone at all, you are going to have a risk if you double team anyone, and all three are good passers as well so it will not be a hard thing for them to find whoever is open. I feel like Dallas may actually get a good result and get the title this season. This all depends on how their chemistry works together as a team of course.