I’m going to try to edit a few blue posts into this when I’m not posting from my phone. =P
Recently Bluzzard has posted about Ulduar, specifically 10 man server first achievements. The essence of what was said is that it is not Blizzard’s intentions for guilds to raid 10 and 25 man raid concurrently. Seperate progression paths is what is intended.
I agree with this in theory, however I feel it’s implementation is extremely difficult. As the leader of a new guild, I am busy recruiting, trying to keep my guild happy, and give us something to do. By that, I mean that we’ve completely smashe most of the current raid content out there. Most every raider has all the gear they can obtain from our raids, so they look for where the next upgrade comes from: 25 man raids.
This leaves me with a problem. I’ve got a bunch of bored raiders on my hands, itching to get into raids we just don’t have the numbers to fill. Way to go Blizzard, this definately seems like a seperate progression path.
I blame this partially on the ease of content at the moment. Guilds have blown through the content so fast that it’s been farmed to death. Hopefully Ulduar will bring a new challenge, and maybe a few more recruits.
Although I still think that Blizzard’s idea that heroic raids are somehow harder to complete (maybe on the raid leader), and deserve better loot is a complete failure (at least with Naxxaramas). The two fights where this is true are Thaddius and Kel’thuzad, and this is only the case because they are proximity/coordination fights. Most of the fights, and achievements are vastly easier with 25 man. Sarth+drakes and Four Horsemen are examples of this.
In my opinion Blizzard shouldn’t award better loot, just more of it, to fit the raid size. This will keep them truely seperate progression paths, as there is no benefit to either path.

[...] high-tier end-game quality gear, from farming tokens out of low-tier dungeons. Extending on my earlier post, this is just going to turn some guilds into farm guilds that gear people up for the next tier, but [...]