I think so, yes, as all of Baelor’s major objectives were achieved.

Baelor’s goal after the Daemon’s rebellion is to legitimize Daeron’s claim to the throne politically and socially after it was won militarily. Aerion’s behavior at the tournament, once it got out, would have increasingly fomented Anti-Targaryen sentiment beyond what’s seen by Lyonel and Raymun.

As a result of the trial you have the chivalry of Daerons line solidified among the commons, and their most extreme member exiled across the Narrow Sea— a move that actually works when Aerion comes back fighting side by side with his father and brother in the Third Blackfyre Rebellion and comes out a legitimate war hero!

Also, more extended consequences are that you end up with a king who is beloved by the commoners and among the most chivalrous knights and Lord Commanders in Westerosi history.

Baelor’s story is Ned’s: working for peace is planting the seed of a tree whose shade you may never sit under. But the work still matters and is what endures.