Hard to give two high usage big men the touches they want and need to fully utilize their talents.
Two high usage players in a roster is hardly a problem. It's when it's 3+ that it might become an issue. But two players? Na'.
It's when the 2 high usage guys are both bigs. That is more difficult.
Than say an inside-outside combo that lends itself more naturally to a two man game.
Edit: I don't think it is a factor in convincing both players to team up. I do think it's likely to be a problem in getting full value out of both guys once they are here though. Cousins had pretty much the entire offense run through him in Sacramento. Kevin Love had similar situation in Minnesota. It'll be hard to keep both guys involved at that often when playing together. Often it'll be one guy with the other guy off the ball.
I can see the point from a "full value standpoint", but at the same time I think Love has much a perimeter game to make it work, and Cousins can operate from the mid-range as well. So this is not really about two bigs fighting for inside work and it becoming a problem, like say Monroe and Drummond to go a bit to the extremes.
Let's take Golden State this year for example, you had Thompson taking 17 shots in a really deep team (in just 31 minutes of play) and Curry about the same in about the same playing time. There low shot attempts more indicative of blowouts (lack of playing time) than opportunities, and again this from a deep team. That's about how many shot attempts Love was getting in more playing time while in Minnesota and the same with Cousins.
We can go with the locals, Pierce and Walker and how much usage they got while playing together, and those guys put even more shots than these guys... of course they played a lot more minutes, but bigs in general have their minutes more controlled anyways.
So I think you're mixing things unnecessarily. If your definition is based on "playing through them", then there's no combo of star players that will satisfy the dilemma you're presenting. If it's a matter of giving players their touches and what not, then I don't think that will be a problem at all, and there shouldn't be a problem with effectiveness considering the perimeter/post options both of these guys are able to present with a varied scale of skill respectively.
The real x-factor in all of this is Thomas and Bradley to a lesser extent. Those two could become a problem if the touches aren't getting there.
But I really don't see much of a problem with Love-Cousins pairing in particular in the context you're presenting.