What are those number of reasons? You mean like Luminous being shit? Because that's the only reason they have to abandon an in house engine they spent millions on.
All you see is yourself being smoked in a debate and trying to hang on for dear life.
Square spent millions on their next gen engine. Square abandoned it and will no longer use it after XV. Not evidence of it being shit though, LOL.
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The Order 1886 is the best looking game on consoles and uses 4x MSAA. Hell Quantum Break is using 4x MSAA as well and is probably the best looking game on Xbox One. MSAA is not "hella expensive", it only is in comparison to the shit fxaa methods you see most developers using these days. Personally, I would rather no AA then FXAA but that's just me.