People are constantly getting confused between Research Tiers and Battle Ratings. A day doesn’t go by where someone doesn’t get mixed up because a piece of equipment is in Tier X, but is actually BR Y and ends up uptiering themself by accident.
So, simple fix: just add the BR straight onto the picture of the item in the research tree to make it unmissable. If future BR shifts are on the way, it’d also make it a lot easier to tell what’s what without having to click on everything to check its BR.