There's two distinctions right now in the raiding community - 10 man players and heroic players. Put them together. Now you have Heroic raiders and 10 man raiders. I suppose you'd feel like a second class citizen if you chose to do only 10 man, ever, but only as much as any player that chooses only to do normal mode, ever, right now. The nice thing is that a 10 man raider who decides he wants to be a heroic raider will have the gear to apply to early heroic guilds (which was not the case in ICC, you needed 25 man normal gear at least).Why would removing the opportunity to do 10 man heroic raiding help make them not feel like second class citizens?
The "second class citizen" feel came mostly from the higher ilvl of 25 man normal gear.