You make a lot of assumptions. First and foremost, it has nothing to do with "having the best of the worst" - on the contrary, during WotLK I was perfectly satisifed with my base tier-10 loot set. I never once complained about how hard tokens were to get, I never once asked for heroic loot to be passed out to anyone with a pulse. Do you know why that is?
I'll give you a hint. Look at the blues you could get for running heroics when tier 11 was still current content. Take all the plate DPS pieces, or all the plate Tank pieces and put them on at the same time. Looks coherent, right? but utterly dull. It looks like it was something that was made on the lunch break of one of the employees.
Compare that set to ANY TIER SET FROM 11 OR 12. Any one. Any of those sets have coherent everything, and typically have bells and whistles. Glowing eyes on the shoulders. A hood that obscures the face. Some factor that makes them look cool. Some factor that makes YOUR CHARACTER look cool.
At the end of the day, i care about my avatar looking halfway decent. Blizzard has made having a cool avatar something only raiders are allowed to do, and that isn't acceptable if they want my subscription money.
and as for what to do when I have my full tier set? Why, good sir, I start working on my full tier OFF set. Gives me something to do, a reason to play. Being told "oh you can only get 3/5 tier" is like telling me "You have no goal to work for". No goal to work for? No subscription money.
Bear in mind - back in Wrath, which is the model I think worked best, casual dungeon running took far, far, far longer to obtain raid emblems. so it would be months to finish my tier, BUT AT LEAST I COULD. I'd keep playing till the raid after firelands if it meant I could finish the tier.
You'd think they'd have thrown a bone to casuals and at least make the old armor set buyable for points - herp derp NOPE.
Frankly, we can argue back and forth all day. At the end of the day, I spoke with my money, and I hope blizzard keeps losing subs until they fix what they broke. At that point, I'll resub and happily play. Until then, I'm done paying blizzard to develop for raiders when I'm not one.