I am with Evil_J and Ceruhe on this. Re-categorization of adventures, while a logical approach, isn't really fixing current game play. Having buildings with huge queues that take 30 minutes or more to re-arrange if I need to put something (or heaven forbid, a group of somethings) at the top, only to find out flash failed to record that effort and the changes to the queue are erased? Those are the kinds of issues that get me ticked off enough to log and go pursue something fun that isn't going to frustrate me with its errors and inefficiencies. By ignoring issues that drive players away from the game in favor of renaming stuff that no one has asked for, this points to a general disregard (or lack of understanding of) for the player base.
As to the adventure difficulty rating, unless there is plan to waste compute resources to dynamically assign difficulty based on each player's troop types available, generals available, and available population count, etc, such a rating system is too subjective to be useful. And please don't waste time and effort on a place few pay attention to.
Regarding the mountain:
Aside from noticing that it appears to provide some additional building spots in lieu of useless water area, there's not much to get excited about. (More building space is pretty exciting, but I am not sure how that ties into a mountain.) There's just too little information to go on to build any sort of hype about.
I don't want this to be a completely negative rant; I realize software development is not the fastest process and things take time. For all we know, these changes were planned out 2 years ago. If so, let us know that. You've done a great job explaining what is changing, but there's little meat as to the "why" of it. If these changes are in preparation for new content that simply breaks the old method and needs a new framework to live in, this would be news that might make it easier to accept. My hope is this post can be read as constructive feedback.