I really appreciate the choices in the design changes and am very excited about the 2600. I had many ARPs and started with Rhodes Chroma and ARP 2600 40 years ago. As much as it was fun to play with the 2600, the transport was awkward (2 cases that were neither small nor light).
From the beginning I liked the decision for a smaller (8U) housing much better - although I am a bit afraid that the sliders are too small. I don't like Korg's idea to build the 2600 optically true to the original but with modern components. The smd (?) design will not sound like the (discrete) original anyway. Therefore I hope above all that the character will be well hit and "works" despite the 12V.
The spring reverb is gone - a good spring reverb would have hardly fitted into the smaller case of the B-2600. If the built-in reverb isn't good enough, it can be omitted (e.g. for concerts, recordings) without any problem - just like (I did) with the original ARP 2600.
The speakers are gone. I do not miss them for a minute. Never used them.
Fortunately, no toy sequencer has been added (like on the B-Odyssey) and the space that was available by omitting the speakers was used for very important parameters: the LFO and portamento controls of the ARP 3620 keyboard.
The Filter-Type-Switch is nice and I appreciate the Upgrade of the third VCO and especially the EG Time Factor Switch - although I'd have preferred *0.1/*10 instead of *0.5/*2. It was a very popular Mod on the 2600.
What I especially like is that the sliders are color-coded. This fixes an old "problem" (27 sliders in a row!)- When you look at them, you feel the acceleration when recognizing the affiliation.
The rear looks good to me. Fortunately a LED dimmer. I would have preferred to see the power switch here.
It's the first time I'm curious about a re-make.