If the BR does return, or it's new counter part, will the old techniques still work? BR techniques have varied from game to game, but some styles continued from H2 through to the current DMR used in Reach since the TU. What are the techniques that you used in H3 that you hope are still effective in H4. Is it possible the TU may be the test of a single shot BR?
I was fairly good with the BR, but tended to use the grenade to weaken the shields then finish with a BR blast.
If using the Sniper I would sometimes quick shoot the body then switch to the BR for the finish.
Post links of game play that showcase your style.