Coming to this thread late, but I have to say, [MENTION=51747]dmccoy1693[/MENTION] pretty much summed up perfectly my main issues with 5E as a DM. It's easy for people to airily say "You don't need X!" (and there's a lot of that in this thread, but that's entirely irrelevant, because I don't "need" anything, I don't "need" 5E at all. However, I do want things, like we all do, and my wants are clearly not unreasonable.
5) Lack of digital tools - This is a huge deal to me, because the digital tools in 4E, limited though they were, saved me a great deal of time and effort, and most importantly, actually made the players closer to their characters, because for the first time in forever, they felt qualified to level up their characters without help, without having to think "Do I need to check book X?", or the like. It was really nice to waste zero minutes of our limited time on level-ups and so on, because it could all be done between sessions.
What is making this particularly bad for 5E is that we can't even use third-party tools, because they're getting C&D'd and so on. So whereas games like PF (and many others) have acceptable 3PP tools (not as good as WotC's 4E tools, of course), 5E has nothing, and the only attempt has been a dismal failure.
So that's huge for me.
4) Lack of PDFs - I'm just not carrying 3+ big old hardbacks around. If it was certain that PDFs would appear later, then I would be a lot more comfortable with this, but there's absolutely no clarity from WotC. On the contrary, they seemed to be gung-ho for PDFs before 5E's actual release, but have now gone completely silent on them.
3) Not much to look forward to - Another big barrier. There's no real sign of what's happening in the longer-term with 5E, and what we have seen, is, frankly, a little dull. I don't need a splatbook every month or whatever, but I want more than this, and so do my players.
I'm still rolling my eyes at the guy who said "Oh I have a good group of players so I don't need splatbooks!". That's just nonsensical. I have a good group of players - I don't need splatbooks, but I don't need 5E, either, or indeed any edition of D&D. But y'know what? We LIKE splatbooks, and a game that doesn't add player-oriented content isn't likely to be popular with us in the long term unless it's considerably looser and easier to add to than 5E (like Dungeon World).
2) Waiting - Really a function of 3, I think, because we have nothing to look forward to, particularly, and no clear idea where things are going, it's hard to be patient. I happily wait 2-3 years on Kickstarters because they keep me apprised of what's going on, what their plans are, etc. - We've had far less "future of D&D" info from WotC than the average Kickstarter (or indeed most RPG companies).
1) No OGL - Not just no OGL, but big talk about how we'd hear about an OGL-type thing (one way or another), and then DEAD SILENCE.
If it comes down to one issue, it's lack of communication from WotC. If they clearly stated their intentions on all these issues, then they'd be far smaller issues, but WotC has a terrible track record when it comes to silence - it often means they are going to do something really stupid and/or are just going to totally ignore an issue and hope it goes away.