No...absolutely not. I have all MkXii purples and I loathe this elitist nonsense. It's ythe height of arrogance to limit someone else's enjoyment of the game because they're pixels aren't purple enough for you. If that's what you want go back to WOW.
I survived the 2012 Forum Merge - Join Date 11/2008
MK X whites can handle Elite STF's. It is a matter of what are Captaining, what sort of Captain you are, and if you know what you are doing. So your proposal OP is completely unnecessary.
How you fly your ship is more important than the actual gear that's on it for the most part. Even the most horribly kitted ships can still do eSTFs with little effort if abilities and chaining is done correctly.
Absolutely... utterly... unequivocally NOT a chance. A good fleet / friends that teach everything to know about doing STFs right, is infinitely better than the digital discrimination, that GearScore has turned 'certain' MMOs into.
And go to the Elite STF channels, if you want a better quality player, for an ESTF. Pugging Elites straight up, has essentially never been a good idea, anyway.
Gear score has been a bad thing in every game that's used it (most of which it's a player creation, not a game feature). It feeds a mentality of itemlevel over all else, so you see bizarre things like rogues with caster daggers and mages with attack power rings or tanks with cloth gloves because those are the highest ilevel items outside of raids.
The only good thing I can say about it is that every WoW expansion while I played, a last-tier raider could get a high enough gearscore to break the mod, then he could make the fools rage in dungeons about his abnormally low gearscore, and solo the first pull without a tank to show off while they tried to vote him out.
The difference between white and purple gear is about 15% - about the difference between blue and purple in WoW. The difference between a rainbow ship and a "proper" build is even less - about 3% per console after skill points come into play.
A team of escorts in full purples with good builds should be doing around 200-400% MORE damage than is needed to hit the DPS checks. Gear accounts for approximately nothing in a margin like that.