I completely agree with you! I love the “panel” form. I miss my La Bestia everyday 
That being said, I’ve heard a few people say that about LW and I totally get it but I’ve been working with Charlie on a single panel (that I hope to keep as my only panel).
It’s basically a “La Bestia +”.
I never felt that La Bestia was lacking anything but this route saves me a grand or so (being a non DIYer and that R*S prices have increased greatly since I sold mine) and adds a few nice features like a dual VCA with 2 inputs each, a small logic section, 2 oscillators vs 1 & a bi-polar mixer.
The 258 choice was a hard one for me to make as this does make it feel more “euroracky” but they do sound good and have a decent feature set, quite capable of drones I’m sure. I’m hoping it doesn’t take away from the Serge experience too much though. Only time will tell 