I'm okay with Larian exploring adding in more strategic options outside of the core 5e rules for players to use.
The problem with the dipping mechanic is that it does not present the player with a tactical trade off- it basically adds extra steps and time for a benefit that has no cost.
1) It's infinitely accessible due to torches.
2) it realistically does not cost any actions since it can be applied prior to combat.
3) There is no CONs or tradeoff on the applied effect. It's a straight damage bonus and cannot backfire.
Fixing any or all of the above 3 would make it a much more interesting mechanic. I.e. you get bonus damage, but -1 to hit due to how blindingly bright your weapon is. Or make dipping like poison where you get a limited supply, etc.
