It'd be interesting to see an editor mode that could jump back and forth between a mnemonic view and a more descriptive one, perhaps even with argument labels to get rid of src vs. dest confusion.
Back when writing assembly code was more or less mainstream, "high-level" macro assemblers were used to wrap assembly snippets into fairly advanced macros which could lead to assembly code that was nearly on the same abstraction level as C code, you could define structs, named constants, write complex constant expressions and so on..
There were also dedicated assembly IDEs like ASM-ONE on the Amiga or Turbo Assembler on the PC, which made assembly programming quite comfortable (I guess the same can be achieved today with relatively little effort by writing a VSCode plugin).
It's not about saving space, but about reducing visual noise and simplifying "visual pattern matching".
PS: Other CPUs do have somewhat friendlier assembly dialects (Motorola 68k comes to mind), but they all have short 3..5 letter mnemonics.