Are there more elegant ways to deal with the issue that LWs are aware of that would not require changing physics to accommodate?
Please note that no currently confirmed physics (specifically, the Standard Model of Particle Physics) needs to be changed. What is under discussion is a number of string theory models. All such models have supplied plenty of testable predictions, and all these predictions have been invariably falsified. The BB problem arises as a consequence of trying to salvage what is clearly not a description of the observed Universe.
In a sense, the string situation is even worse than that: there is no agreement on how to approach cosmology in string theory. All these landscape papers are based on ansatze that just guess how the big picture works.
The Boltzmann brain problem arises because the volume of eternally inflating de Sitter space is vastly bigger than the non-inflating regions, big enough for an exponentially unlikely entity to fluctuate into existence. But de Sitter space is quantum-mechanically unstable, and how to do quantum gravity there is probably the outstanding issue i...
Leading inflationary multiverse theorist Andrei Linde (and others) gives significant enough credence to the Boltzmann brain problem to tweak some of the parameters of his theory (here for example http://arxiv.org/abs/hep-th/0611043). Are there more elegant ways to deal with the issue that LWs are aware of that would not require changing physics to accommodate?