I'm sure there will be unexpected reprecussions, but every MMO has those.
I don't see modding or cheating being any more of a problem than in any other MMO. While the gameplay may be similar to Oblivion or Skyrim, I think they realized that it would not be possible to simply revamp that same underlying engine into a multiplayer version; hence the re-introduction of a fixed class system which has not been around since Arena. Hell, if modding were allowed in anything remotely approaching Skyrim modding it would probably not run at all.
Actually, that reminds me, there was supposedly a project underway to make a mod for Skyrim that would allow multiplayer (on a far smaller scale than MMO). My initial impression was "that'd be great, if it weren't for all the OTHER mods." It might be made to work but with anything other than a bare install I would not have high hopes.
As to the wide-open sandbox, every MMO I've played has already been a wide-open sandbox in one way or another. As to everyone else doing what you're doing.. well, if you don't like that you probably don't like MMOs at all; those are issues of the style of gameplay, not with the TES setting. I don't see it being a problem just because the other 5 TES games were single-player sandboxes, any more than the issues inherent to MMOs made it a bad idea to export the Warcraft RTS setting to an MMO.
That said, IIRC Kaffis, you and I were 2 of the original founders of Atagenos when Vanguard came out and we all know how
that ended up so I certainly understand trepidation. However, reading your comments gave me an interesting thought:
Back in 1999, 2000, that era when EQ was the big kid of MMOs, Morrowind wasn't even out yet, and Velious was new, unexplored territory, I talked about TES with some of my guildies, only about half of whom had even ever heard of Arena or Daggerfall. At the time, the half of us who had agreed that a TES MMO would be
so awesome!
Looking back, I'm glad it didn't come out then when Asheron's Call and DAOC were coming out. I'm glad they chose to stay single player with Morrowind. I'm glad they didn't try to cash in on WoW's success and compete with it when it was new, or even when it was 2-3 years old, Oblivion was coming out, and Vanguard was tripping over its own feet. I'm glad they didn't come out with it even instead of Skyrim.
Instead, I would say, it's time. I'm going to make an analogy here some people will get better than others. Some parents are pretty practical about the fact that their teenagers are going to eventually have sex. They tell them "look, just let me know when the time comes and we'll make sure you have some protection". They don't tell them "no, don't" because they know that makes it worse. They may tell them it's better to wait till marriage, but they don't try to force that.
Now this is a very loose analogy for reasons everyone here is smart enough to comprehend, so please don't excessively pick it apart. I think, however, that whether you consider this marriage or just getting ****, TES has definitely not rushed into things, and its using protection. This game has been in development since 2007 and in the meantime Skyrim has come out; a game that's been all-in-all pretty successful. I don't see signs of trying to make a WoW clone, of jumping on the bandwagon, or of abandoning the single player sandbox theme in pursuit of "MMO at all costs". I think this franchise is mature, and it's time for it to break into the MMO route.
I'll be disappointed if this means no TES 6, or if it kills Bethesda or TES, but.. I don't see it happening.
Now, I may be indulging in a certain amount of fanboism here; I hope not to much. If there ever was a computer game series I'd be a fanboi for, this would be it. I am not without concerns. I am not at all sure about the "no shards" idea; that may lend itself to overpopulation. I like the "choose what armor and weapons regardless of class" thing A LOT! I don't think historically, being able to wear heavy armor has been anything like the benefit to a class that developers, even in the PnP realm, have imagined. That said, I worry that either armor will be irrelevant or that there will be one "right" selection and a bunch that are "wrong" once the number crunchers get their grubby mits on the game.
Ultimately, my big concern with this is not anything the developers might do, but rather what the players will do. My biggest worry turning this into an MMO is, frankly, nerds. Not geeks; we're all geeks, but nerds.
Stop Having Fun Guys. Once a game goes multiplayer, it is fully exposed to the wrath of people who think online gaming is Serious Business. Up till now, TES has been protected by the simple fact that you enjoy it in all it's glory or horribleness in the privacy of your own home and that's about to change. The game is about to be exposed to the wrath of the whiners of the internet for whom game balance is national security.
That's my big worry, but I think it's time. Like losing your virginity, it won't be the same afterwards, you can't go back, and it might even **** you up for the rest of your life but.. sooner or later you have to do it.