As person who's been in MMO world for six years now, I highly hope there will be sub fee for playing TESO. Because if it doesn't it will become just another free MMO with things like;
1. Able to buy armor and weapons by real money.
2. Buy gold by real money.
3. Probably weapon skins, with improvements for real money.
4. Some extra spells, real money.
5. Extra advantages for real money.
It would become a game where you are as good as much you pay for it. It wouldn't matter how good you are in gameplay if you run into someone who can obliterate you with one swing of his axe, or one arrow, spells, punch, trap, etc, and you are the same level. It would be a gameplay killer, and at the end of a day, you would have only people who spend loads of $ on top, and you will never see a fair fight with them.
Many complained when Blizzard announced there will be a monthly fee for their game, but even with it, they've become one of the lead MMO's till this day.
That is why it would be great to have a monthly fee for this. Nothing comes for free in life, and I'd rather spend 5-15$ a month and have balanced game experience with everyone, than play it for "Free" and have people who spend more than 100$ a month who will wipe the floor with me by pressing one button. Free MMO's are the most expencive ones if you wanna be good in it and have a proper fight.
Reason why I'm posting this, is because some people who didn't play MMO's before fail to understand this concept, and it would be pointless for them to encourage Beth into something that they will regret later on.
Truth is, at the end, I doubt our plea's would change Beth's mind about this, for whatever they decide it will be done as they will, not by our opinion (which is normal and understandable). But yeah, keep this in mind because it might break on your back one day, and you will be the ones who wanted it.