There have been a number of threads arguing for brd to get a damage dealing LB. There is also a lack of imagination in giving SMN the BLM LB.
What would you guys suggest as alternatives to the present Lb for these two classes, or even for others.

For me I'd pick.

BRD - "sound the charge" - plays an inspiring charge which increases effectiveness of abilities and damage dealt by all party members by X amount for X length of time. ( alternatively perhaps reduces GCD and recasts by X amount for a certain length of time)
The thinking behind this is that BRD is a support class and should have a support rather than dps/healing LB.

SMN - Let them use a watered down version of the move the summon they happen to have out uses in the primal fight. mini hellfire etc kinda thing.