Yes, there are still work arounds. But think about it this way. Someone plants under alias with no intention of playing. All of a sudden they're doing well and have a good shot. Now what's going through their mind? CRAP! I'm not on my main account! This won't count for it!
Next era he places with main account incase something like that happens again so he can get his medal and recognition. He gets conquered, gets found out, and people keep track of him and prevent him from building up this time knowing full well who it is.
People LOVE showing medals and who they are AFTER they know they got the era in the bag. They never want to admit "hey, you bested me this era". If they can, they'll simply bow out without saying a word to reveal their identity if things fell apart early. There will of course still be, "oh I wasn't even trying! You beat my JW team. Good job loser" going around. People are sore losers. That will never change.
So essentially, it's a trade off. Sure, not everyone is as fixated on medals and such every era. But many are as well. Why hide what you so called "earned" though? If you want to hide, you still can. But it will be at the cost of having all your medals on same account And to me, I think it's a small, but nice way of doing things.