Goodbye to Johnny Train Set?

Cataclysm Raid Progression changes (source):

• 10-Man and 25-Man raids will share the same lockout.
• 10-Man and 25-Man raids difficulty will be as close as possible to each other.
• 10-Man and 25-Man raids will drop the exact same loot, but 25-man will drop a higher quantity of items.
• Normal versus Heroic mode will be chosen on a per-boss basis in Cataclysm raids, the same way it works in Icecrown Citadel
• For the first few raid tiers, our plan is to provide multiple smaller raids. Instead of one raid with eleven bosses, you might have a five-boss raid as well as a six-boss raid.

I'm not sure if a larger number of drops will be enough incentive to do 25-man raids.   

Dealing with Johnny Train Set for 16 hours a week has never been a fun part of raiding.  It's been more of a necessary evil to fill out the 25-man roster.  In most raids a 25-man team will include Johnnies who are brought along only because raid leaders need to fill out the roster.  A lot of raid leaders would not include these players given a solid replacement.

Not to mention the job required to schedule 25 players and deal with players that don't show up consistently, are tardy, just leave without notice, etc.  I believe a lot of the "no show" problem is directly related to the current pace of raiding.  We all love to play the video games, but when it becomes more like a job then fun,  there's a tendency to blow it off every once in a while.  A new slower progression requiring less hours per week should lower the "burn out" rate of Raider rank.

If the pace is a lot slower, I imagine their will be an explosion of ALT raiding.