Just like collecting grims and tomes, I feel like it would make quickplay a lot more worth its weight.
I agree an exp boost would be a nice addition.
I (literarly) second this, doing vet with low level chars because you don’t wana mess with people on champ+ is … tedious.
Why not just give bonus exp overall? I think the quickplay bonus is incentive enough as it is? I don’t think it should take as long as it takes to get to level 30 in any game mode.