Definitely looks interesting. The way you can experiment with your tools and the environments can inspire massive creativity. (I'm thinking Razor mine + Sparta kick

)
+ But let's face it, the game lacks real variety. I know you can pretty much freely move around your environments and try out things; but that's it. It would be nice to have a lot more interaction with the environment, like destructible environment to a certain degree (roofs and walls that can be destroyed). This would add a lot more to the ability to experiment with the environment and also as open the door to the madman in everyone of us who just want to see the world burns (or exploded, bleed, skewered, etc...)
And interactions with the environments, like throwing stuff around, and environmental kills (head meets window frame, fence impalement...), more objects to be manipulated with...
The maps seem to be big, but it's really just a big map filled with not too much stuff and all you do is use your abilities to kill people. While I would like to have a complete open world; same size maps but deeper and more details and things to try out and experiment with would be alright, too.
+The AIs remind me of Skyrim AIs whom try to as quickly as possible to headbutt you the moment they spot you; and if they didn't find you then to them, you've never exist. This can dumb down the experience to just killing a bunch of flesh and bones simpletons. I would love to see improve AIs that feel and react (like showing fear, retreat and call for back up if they feel threatened, etc...).
In Skyrim, I think I was able to recreate what Dishonored would be (or vice versa, what Skyrim's stealth should have been), by simply invest in Illusion and Conjuration. Lots of experimentation with the even limited environment and AIs; but this environment is the size of Texas, and filled with dumb-asses.
An idea is to include enemies that are assassins themselves, who can do things like you do. This would create a much more satisfying confrontations where you are trying to beat these badass assassins at their own games.
+And the stealth. I like that how the stealth is reasonably smooth, and if you get caught you can always react on the fly. But stealth is way too familiar to Skyrim; which is good AND bad. It doesn't feel like true stealth, but it's probably due to the AIs
+Also, the upgrades are usually just simple Damage Increase, Accuracy increase; for powers its Duration Increase, Power Increase... Like I said; lack real variety... I would love to see some special enhancements to weapons, tools and abilities, such as
+Overall, this game would give you the somewhat freedom as much as Bioshock or Skyrim does... But I can see MASSIVELY HUMONGOUSLY GIGANTIC potential in a franchise. Add open world (huge plus), more complex enemies AIs, environment interactions and variety, power and tools variety, destructible environments (another huge plus)... Oh man... then we would have a heavyweight contender for a unique and kick-ass franchise.
I WILL get this game new and full price at least the end of the year (mostly due to having Borderlands 2 right now, and Hitman Absolution awaiting by the end of this months; and 6 midterms and 3 finals

) mostly because I want to support the developers so they will go ahead and push for a Dishonored 2.
+I'm seeing this game like deja vu with the first Borderlands, whom started out quite nicely (with the buying point that are the guns), then it evolved into a game with a massive amount of variety and a clear improvements from the first; while retaining what made it Borderlands in the first place.
As with this game, experimentation and steampunk, dark story seems to be its buying points. Make these elements as the franchise's "special things" and improve upon them
PS: With all of these abilities, it would be cool if we aren't tied down by a story. I would hope to be a free-lance killer in Dishonored 2, who can choose to become something like the Joker, whom inspires fear, chaos and destruction on the world as things blew up sky high around him.
And sorry for the fragmented grammar; not thinking straight at 1 o'clock in the morning.