I'd definitely prefer a bit more experimentation in the spinage- and even the front covers. Who really wants an entire bookcase full of stuff that looks the same? Surely it's much more interesting to play around with them?
I'd start by redesigning the Case Files- the American ones look great!
There's been some much-appreciated movement in the design of 2000AD trades of late- but the spines have suffered with overuse of the design, i think. Brighter colours! More contrast!
SBT