Okay. I honestly find that is a thin explanation but I accept why one would put stock in it. Sincerely.
Then again Palmer had a career 55.8% completion rate in the Red Zone (51.2% inside the 10) and Flacco has a 50.4% career rate (47.9% I side the 10).
And Brown still has a 51% catch rate in the red zone 38% inside the 10 regardless of explanations.
If Brown was signed by Green Bay, New England or New Orleans I would probably be driving the bandwagon. However, at best Brown made a lateral move at QB and possibly a downgrade.
I think the best possible way to view Brown is through the lens of increased opportunities. It really looks like he is the #1A/B WR in Baltimore, a status he never came close to in Arizona (for obvious reasons). So even if his career rates hold he should still have his best season by a wide margin. And if he improves on his career averages, which is certainly possible (averages typically encompass a wide range) he may even finish this season as a mid/high end WR2. I don't see top 12 WR potential in this offense.