Again one more time you misunderstand my way of thinking about this I will say it one more time I have nothing against casuals or anyone who get gears same lvl as I do either I get it from raid or they get it from 5 man heroics with the same item lvl. I don't treat them as unworthy just because they didn't experience the same thing I did this is just immature and childish way of thinking. I'm casual myself I'm not some kind of elitlist who get jealous of some players who get the same item lvl gears as me in 5 man heroics instead of raids that is not my point I will say it in caps so you can see it : I HAVE NOTHING AGAINST CASUAL PLAYERS BECAUSE I'M ONE OF THEM.... now that we are clear with that my point was to make old raids viable for longer period of time than just one patch content as it's now. By doing that the lifespan of the raid content will be longer and people will be busy progressing still even to this day instead of just clearing the latest raid content patch in less than 1 month then get bored of not enough content or raiding to do it's just a method to keep people busy while new patch inc but yeah this is just my opinion of this matter ofc I don't expect everyone agree with me.
To answer your question how would I get gears up my alt if this system get on? simple answer will be: craftable items, valor points and justice points epics will be more than enough to let me enter LFR and start farming because 5 man heroics still get you valor points so this is not a problem at all.