I only make assumptions, but i think the main reason behind the decision to use the aluminium-inlet is that the RGB-Leds shine through the case and would lead to an washed out look ofthe logo.
The logo-change was to reduce the production costs.
When the logo is mouldet in to the case, most companies use simple logos with few details.
This ist becausae sharp edges rises the production costs dramaticaly.
Take a look at Apple, Android,.... and you will see.
With the sharp edged logo:
The production of the mold is much more complex.
The production-tolerances are much smaller.
The reject/waste rate is much higher.
In my case, I don't want to pay 20 to 50 Euro more, only to get a fancy logo.
But I'm only a old geezer which thinks that the design is much less important than the function.
I know that the kids this days think the other way around.
But if you have a well build product which is designed to last long and work propperly, the whole product get its one individual elegance.
[Edit]
Damn, I have to learn to write english much faster.
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