I'm pretty okay with the durability removal. I always found it... let's say frustrating that due to the generally limited availability of rare/high-end weapons or the costs associated with buying them, I'd inevitably end up hording them for the entirety of the game for the final battle instead of just using it freely. I had this issue a lot in Awakening with stuff like the Hauteclaire, Balmung, Helswath, etc and as a result ended up with a large stash of high-end gear that I was only really willing to use on characters with Armsthrift and high luck. Everyone else just ended up using steel weapons because they were cost efficient and easy to replace.
All the durability removal needs to address to keep it balanced is the relative power of weapons and how easy they are to obtain. Their durability costs in previous entries was in itself a balance to how strong they could be, sure you can wreck a few fools in a single hit but once that weapon's gone it's gone. If they don't break, you can shift the power of the weapon down to be 'powerful' instead of 'absurd' to account for the infinite uses. Could also potentially lock them behind difficult side-missions/paralogues/optional mission objectives so players can't just snatch them up effortlessly and faceroll the game.
In trade, according to siliconeria and gamespot we get 'Dragon Pulses' which allow us to manipulate the field/map during battle.
sauce:
http://www.siliconera.com/2015/05/1...modes-and-no-longer-has-limited-weapon-usage/
Placing bridges on the map, causing earthquakes, flattening mountains... that adds a new tactical dimension to the game that I quite like the sound of. I'll happily take that over weapon durability, providing it's done well. Setting up some legit flanking manoeuvres by altering the map at opportune moments sounds good to me.
Also who was actually asking for Phoenix mode. Seriously if you can't even wait for the end of the map for your units to revive then TBH you probably shouldn't be playing strategy games.
Phoenix mode isn't a bad thing. It's simply a setting, and it's not aimed at people like you and me, it simply serves to broaden the audience of the series. People get turned off by difficulty and this series is fairly notorious for it, telling them they don't have to worry about getting frustrated by the game and can just casually enjoy it will help sell more copies. As long as they retain options that allow long-term fans to enjoy the series in a more traditional fashion, I'm all for things that will help FE sell better and succeed more.
Edit: also on a somewhat unrelated note I really like the design of the default female avatar in this game. If this game features a log book I might start a save file with the FeMU and add her to it so I recruit her for my first playthrough on my MaMU.