Rent it...unless you like to own the games you play.
When it all comes down...more or less its a 8/10...more than most enjoy while the die hard dislikes.
Don't really understand the dumbed down thing...folks who feel that way more than likely...never play above easy mode.
I will say it is a different approach to previous games...but with all the success most AAA shooters get...you can not blame a company/dev for branching out into what folks like...
Hell....loook at every splinter games sell's...
rather someone try new things in the game than the same old same old...