Thybulle is overrated
76ers are in big trouble without Josh Richardson
Burks and Robinson should both help. Obviously not the player Josh Richardson is, but Burks in particular, should give them decent production as a starter until Richardson is back and Robinson becomes their best back-up.
They really did get great value acquiring both of them for 3 2nd round picks. Both also fill that shooting need the Sixers need.
They still have fit problems in the starting lineup, but the bench shouldn't be as much an issue with those 2 on it.
Guards - Simmons, Richardson, Burks, Milton, Smith, Neto
Wings - Harris, Robinson, Thybulle, Korkmaz
Bigs - Embiid, Horford, Scott, Bolden, O'Quinn
I'd honestly think they'd be better starting Simmons, Richardson, Burks/Robinson, Harris, and Embiid and bring Horford in off the bench. I think that would give them a more cohesive starting 5 and would help a lot of the fit issues that Embiid and Horford have playing together and the extra shooter would help as well. Horford would then come in for Burks/Robinson with like 4 minutes gone in the quarter, and play some with Embiid before he leaves the game and they go back to the smaller lineup but with Horford as the sole center (or he can play with Scott). Horford would obviously need to buy into that, but I do think that would make them a better team.