Why haven't they thought about this?

Also Belle, Rob, Whimpu, and Jubjub.

Also Jeeves, Karen, Swag, Chris, SMG1, and SMG2

Jesus so many people being left out!

It's because those first four are the anti-cast. They don't care about them, they were practically only meant for "I can't believe it's not SMG4!". Swag and Chris don't need redesigns unless SMG4 gets another lawsuit. The rest, idk why they don't have redesigns.

yeah but still smg1 2 deserve one kinda imo

What Ender_Dragon just said. Then again, they're not much of the main characters, they'll be forgotten just like SMG3's The Dark Force.