I think the hard part would be getting people to NOT roll Gnome...the problem that i think would occur is getting somebody to level up, not that its hard to level to 54. Unless someone has a random alt sitting near 54. If people are going to level up to 54, they may just want to level to the 60 or 70 bracket, hence the reason many people do not reroll in the 60 and 70 bracket is because of the leveling.
This looks very considerable. As I have an ex. 49 twink now at level 51. Furthermore the condition seems not to be bad. No dk's, no TBC gear, but slightly health buff for all. Finally a bracket that gives the old school semi good vanila gear a chance to glimmer since the beginning of wow.
Except gnomes having a favorable health buff to others, I don't really mind. Maybe horde has another advantage yet to be discovered.
This idea has my support.