1) Patch notes are released on Patch Day. It's common practice.
2) Worried about HDD space? Make a couple gigs of room.
3) Did I miss a post indicating LOTRO was moving to Cryengine or Unreal? What makes you think you'll need new Hardware to play?
As with all information I would learn and prepare where necessary - you might like to try it some time.
1) As I acknowledged in my post.
2) Why only a couple of gigs room? It could theoretically be as high as 16GB. If we had a download size (and it is stretching credulity to breaking point to think that Turbine don't know how big it is) I'd know exactly how much room I need to free up, if it were the case that HDD was my concern here.. It would be a bummer to get midway through the download and it fail because none of us have any idea how big the download it. However, HDD space wasn't my concern there - monthly download limits was the concern, many, many people are still constrained by such.
3) You clearly missed the post where the DEVs said that Big Battles would require an increase in Minimum Specs - the new MS MUST be known by now, so there is no valid reason not to inform the player base. I know from experience of my Kin (mainly mature gamers where there are many other priorities for money for before PC upgrades) that there are a significant number of players out there whose systems are towards the bottom end of the current specs range. Which is, I suspect, why in my kin Pre-Orders are at the lowest level ever.
Would you pre-order a car without knowing its engine size, seating capacity, and MPG? Of course you wouldn't. Its a simple principle - don't spend money until you understand the liabilities involved.