Rerouting through BZA bypass will save >=15-30 Mins + No LR + Improved Punctuality as BZA is skipped altogether.
12727/12728 may be OT'd if timings are not tweaked as 22203/04 might reach ahead of it!!
I'm sure 17015/17016 (with LC), 17479/17480 & 17481/17482 (NO LC) have CC @ RJY along with lots of Goods. Not sure about 17239/17240 though (5Min halt in practice & in TT).
So...
more... TECHNICALLY, Crew Change @ RJY instead of BZA is very much viable (Same Division + requires max 5 Min halt). IF it's COMMERCIALLY PRUDENT, it should be done.
But BZA being political & organizational powerhouse, no Logic might be good enough :(