I am going to wait til after launch and see how good DLSS is and what games use it. So far it looks like DLSS gives an extra 50% performance. So a 2080ti being 80-100% over a 1080ti might be worth it.
If you look at it like this - that this is a ti in name only, and really just a Titan, the pricing and release timing makes sense.
Doesn't make sense to buy one though, just like it didn't make sense to buy a Titan.
Based upon the leaks and points above...
If the 2080 was a Ti, then it would be meh. Right now as it stands the rumored 2080 performance being a tad faster or on par with the 1080 Ti, is in line with expectations for a typical non-Ti release. Pricing is the only thing that isn't in line with expectations. Everything is shifted up and you really aren't getting more per/$ with the new gen, but rather new tech for a similar price point. My 2 cents.