The Removal of Obligation
Graylo addressed the purpose of changing the 10/25 to a single raid lockout and ended by stating that he didn't understand why the removal of obligation meant that the two formats needed to be relatively equal. As a raider who would prefer the 10 man format simply because it requires less organization and does not require me to depend on 24 other people, a few of which are guaranteed to bail or otherwise let me down and cause attendance problems, I feel that this is obvious.Repeatedly, Graylo talks about choosing between the format and the gear. He claims that it makes no sense for a player to state that they like a 10 man format but raid 25 man instances for the better gear. And, he claims, their actions prove they do not like the 10 man format as much as they like the 25 man gear. This is true. However, I think a larger issue is being missed here. The player doesn't prefer one format or another more than they prefer making their character the best that they can. Currently that is a "no choice" desire. If one desires to maximize one's character, one is forced to run the 25 man version of the raid. Without equalization of 10s and 25s, one will be forced to choose 25 mans again. But this choice has absolutely nothing to do with the format of the dungeon. It has to do only with the loot available. All other things being equal, the player would not choose to participate in the 25 man. They would choose the 10 man. In some respects, their choice of format is being removed by their desire for gear.
I see no problem in scaling the 10 man encounters up to the level of 25 man encounters. Keep in mind that with the current implementation of the raid system, a 10 man dungeon is balanced around the idea that the players in it only have access to the previous 10 man gear. These items had a lower ilevel and consequently meant that the characters for which the dungeon was balanced were less powerful. Changing the lockouts and the gear dropped would allow Blizzard to rebalance the 10 mans so that they would prove challenging to people in the previous tier's best gear. This could include factors like steeper penalties for standing in fires since there is more room. Larger AoE explosions requiring more selective positioning. Having the same or slightly more adds per DPS on a fight to promote triage. Not scaling back health pools by the exact ratio of expected DPS. There are many ways to "balance" a fight that doesn't involve taking the 25 man encounter and scaling it directly to the damage and healing that a 10 man version could do.
The Slippery Slope
The slippery slope is a common argument for gaining support. Unfortunately, most slippery slope arguments are logical fallacies, more commonly known as the Fallacy of the Altered Standpoint. Asserting that if we let X happen, then Y and Z will follow in order to gain support for stopping X only works if Y and Z really will follow. I know a few people that pine for the 40 man raid days. They miss the epic feel. But the biggest resistance for changing to a 25 man raid format came in the form of guild size. How should a guild of 40 downsize to 25? I don't think you can say that the demand for the 40 or 5 man raid style really will follow from equalizing 10 and 25 man loot. In fact, as long as the Dungeon Finder stays in place and the dungeons act as an entrance point for gear, I doubt you'll ever see people asking for equalized difficulty on the 5 man front. If that were to happen, then quests would have to provide gear that was good enough to enter the raids straight out.Equalizing 10 and 25 mans will not only simplify loot tables for Blizzard (a clear goal) but it will offer players a choice between the feel of the instance and the possible speed with which they get gear. The key to this is having the 10 mans drop the same quality gear. I don't mind taking a little longer to gear up because I prefer the format of the 10 man. I do mind not being able to reach the same level with my character without doing a 25 man. Is it possible that the 25 format will die once people have begun to gear up and then they drop to the 10 man format for achievements? Sure. But this is a slippery slope argument just like the one above. There is absolutely no certainty and why would a 25 man raiding guild drop 5 of its contributing raiders to downsize into 10s and get achievements? I think once the guild decides to run a 25 man format, they will stick with it until they either can't field the 25 man raid anymore or simply disband. They won't change midway because they've got the gear.