I think there is still room to hope for "hotter but more rain". I read in one place recently that the tentative predictions from a few years ago of "more violent cyclonic storms" perhaps should have been even more tentative.
My theory is that, when you don't know, you DON'T know. Looking ahead is necessary, especially if you're trying to dodge a global-sized bullet that will take decades or centuries to really cure ... but I don't think climatology is advanced enough to predict very much more accurately than "that extra heat has to go SOMEWHERE".
And possibly, if more clouds happen to occur where we now have deserts, maybe some deserts will become more productive, to balance the regions where crop yields decrease.
But I suspect that farmers everywhere will have to adapt, and I just hope that climate changes are slow enough that we CAN adapt. Some people have pointed out that fairly small changes in regional climates seem likely have have fairly large effects on insects pests and plant diseases, since those are so specialized. At least one person claims that pests are likely to adapt faster than plants and farmers!
