I've been thinking about this a bit, because as I saw it I expected siding with the qunari to have a bigger payoff than what we saw in the game, by pay off I mean an effect on the final outcome of Dragon Age Inquisition, not Dragon Age 4. Disappointed that there is (as it currently stands) appears to be absolutely no consequences to the choice (aside from the personal consequence to Bull), because don't both sides get war table missions?
It's true, up to a point. The Chargers provide several missions if you keep asking Krem for ideas, but most of them can be done before Iron Bull's personal quest. Meanwhile, the Ben-Hassrath provide two operation chains.
The consequences, as you say, are mainly personal for Iron Bull. The Inquisition will win, with or without Qunari support, so in the end is a matter of alliances and personal feelings.
Do you care for Iron Bull? With which decision do you think he's happier? To follow the Qun, his homeland, the people whose values and ideals he shares? Or to save the band, his friends, the people he's been taking care of for years now? If it's a matter of strategy, whose help do you want? An alliance with the powerful Qunari (making history just because of that) certainly pays much better than the services of a mercenary company, doesn't it? We're talking about saving the world. Or do you think that it's only a temporal offer and it's better to trust the mercenaries who have been helping your cause and saving your men long before the Qunari were willing to do the same?
These are the decisions I like in Bioware games. Whatever you choose, you can't help but feeling that you have done something wrong.