The 17 Pro has objectively better performance than the 15 Pro. This is not debatable. You do not have like the look of the 17 Pro, that is true, but it betters the performance of the 15 Pro in a number of areas.
As for the so called "premium feel" I am sure Apple, like many other people, have probably come to the sensible understanding that most people these days uses cases, or at the very least bumpers. So the feel of the phone loses most of its relevance. If you put your new iPhone in a case, the feel of titanium vs. aluminum becomes irrelevant, because you can no longer "feel" the phone - only the case.
We are already seeing widespread tests and reports that show the new iPhone 17 Pro is much more durable as it relates to drops, specifically as it pertains to protecting the screen from cracks and breakage than past Pro models. While that might not fit everyone's definition of durability, it will probably cover the vast majority of peoples definition.
Every design of engineering involves some tradeoffs. Apple wanted to make a more durable phone, that is bigger, yet lighter than it would have been with other materials such as stainless steel, that dissipates heat better, while be more powerful in terms of processing and GPU performance and yet still maintain the more mainstream definition of a Pro iPhone. I think they have, for the most part, accomplished that.