First and foremost, I think what you read makes a lot of sense. I am not an expert in this field, but I will share my layman perspective/opinion. The 2 perspectives are:

1. As a small time investor: I look at this much like investing in the stock market... so generally what the technology had achieved, what is in the roadmap, and who is supporting it by funding it and/or innovating with it. With Enterprise Ethereum Alliance backing it and the ongoing innovation such as UN using Ethereum to distribute funds in a large scale test, I will likely bet on ETH.
2. As a hobby miner: I do not and never will have enough stake to play when the transition happens. I think of it as ETH growing up to become a big boy's game. As a small boy, the logical course of action would be to switch to ETC or other altcoins so that GPU mining may remain as profitable as possible.