I know what you mean about there not quite being those 'this is totally OUT THERE' thrills, but for me I think it's a problem that can only be solved by finding new writers and artists. In this week's Prog (2257) we actually DO have three thrills that, for me, qualify as things I could never get anywhere else...
...but they're all by people whose work can't help but feel familiar because I've been reading it for 20 years.
Rennie and Reardon on Diaboliks are delivering whiny druggies and demons in London, and it's very much my thing. I do like London-based stories, it's comforting and fun (especially when it veers away from the bloody East End and gangsters. It's a big city, y'know, not just one square mile!)
Edginton and D'Israeli are putting as many possible Worlds at War as they can in Scarlet Traces, and it's gorgeous.
Abnett and Harrison on the Out take the cake by having an entire episode set in and about a Bowie analogy staging a planet-scale concert. This is probably the most 'wow, that's different' thing in the Prog, but even this has precedent (looking at you, Max Megadoom / Douglas Adams), and even the ways it's new are very Abnett-y and Harrison-y.
...so I can't see how Tharg or anyone could do any better, until such time as a new voice turns out to be good enough at actually crafting comics to be publihsed. Stewart K Moore is kind of doing it for me, artwise. He's got a fluidity that I don't think Ive seen before in 2000AD, and I love it. Put HIM on Skip Tracer and maybe it'll actually break out of its blandness?