I like what you're getting at here, but this roster kind of gives me feelings of the Sixers two years ago, when they had that big, defense-first starting lineup with Richardson and Horford. People were impressed by how capable they were defensively, but questioned whether or not they'd have enough shooting, and they were right.
I like the Schroeder addition (hard not to), but playing him along with Smart in the backcourt will be tough given the lack of shooting. Same goes with Richardson and Dunn, unfortunately. Those four guys are all great defenders, but are all suspect from deep.
Pritchard is going to get more time than people think this year, not just because he's showing out in Summer League, but because his shooting from deep is something this team desperately needs. Put him a lineup with one or two of those dogged defenders above, plus the Jays and whoever you want at center, and you've got something that can work.
It would be nice to move Dunn for a big wing or a traditional power forward that can play alongside Horford or R Williams. I'm sure the front office is thinking the same thing.