How is it nonsensical? As I've noted Bioware themselves claim that the same people who did MEMP did DAMP. They attempted to make DAMP in MEMPs image and utterly failed. Now they will make a second attempt. What is prudent to note is that they never acknowledged the shortcomings of DAMP. The fact is Bioware think they did a really great job with DAMP, and are therefore unlikely to try to avoid making the mistakes they made with it in ME&.
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First, Bio will not admit that the DA fighting style is not amenable to modern shooter type MP action. You should know that ".. Bioware think they did a really great job with DAMP,..." is plain BS. EA forced them to include a MP component because EA policy is not to greenlight a project unless a Multiplayer component comes with the game. I knew from the start, that DAMP would be weak because of the main campaign combat design.
Second, because the DA combat style is unsuited for MP, does not mean that ME:A MP will suffer. On the contrary, Bio specifically stated that ME:A MP is based on ME3MP and will feel very similar. It is a winning formula.
Why you believe they will fail is a mystery.