What's interesting to think about is what form these adjustments might take. I don't think we'd see the game "systems" change significantly (i.e., AI behavior, disguise functionality, overall gameplay features). Maybe number/values tweaks here or there, similar to balancing patches in multiplayer games, but not total re-hauls.
More likely, our feedback would inform the level design of to-be-released locations. And I think that's exactly where the feedback should go... Hitman games, imo, live and die on the level design. The levels are the real stars, even more so than 47.
Based on what I'm hearing so far from the devs, that's exactly their philosophy in this title and I couldn't be more excited about it. I believe they are doubling down on the replayability of truly excellent Hitman levels and intend to make each level a playground for not just multiple replays of the story-based targets, but also of countless other missions. I suspect that to make sure they get that as right as possible, they're giving us a portion of the levels and then are going to find out what level design choices/elements really worked, and what was less successful, so that they can take those great elements to put in the 2016 levels and, for those levels, cut out or modify the elements that didn't really work.