The idea that the multiverse can continue to expand at the incredible rate that would be required based on the idea as stated always made it seem implausible to

The idea that the multiverse can continue to expand at the incredible rate that would be required based on the idea as stated always made it seem implausible to me. Furthermore, it bothers me that the idea discards the notion of probability inherent in quantum mechanics, since everything that can happen, does. A more sane model for me is to imagine the state of the universe as a quantized distribution over a set of set of states with finite measure. This is sort of like the multiverse in that the wavefunction doesn't "collapse" but instead reality "branches." Unlike the multiverse, branches are constantly being created and dying off, since the information content of the universe is conserved. This also preserves the probability derived from the wavefunction - states are kept or discard based on their probability.