Regarding Tales of Zestiria
Played it for roughly 8-10 hours. It is a slow starting game. Hints at lots of battle tactics, but take a while before you get skills to do everything, but that is Tales. Tutorials until the end.
Story seems decent, but I'd place it at around Xillia levels so far (without having finished Xillia 1 (40 hours in) or played the sequel). Both Abyss and Vesperia were better in terms of start and characters. Granted it might change later on, as said, it is slow to start. I have just cleansed the second city, and still don't know much of anything regarding the bigger story.
There is a fast travel system that lets you scroll between previously visited save points, so can't scroll on the world map, but from a visual standpoint (dungeons excluded) it looks like I have been to around 5% of the world map so far. Unless it ramps up quickly, I think the how long to beat stuff is fairly accurate with 50+ hours for main + extras.
Preview verdict: If you enjoy tales games, you can safely buy it. (NOTE: There appears to be a few slowdowns in frames at some odd times (PS4 version). Like when encountering a "dangerous encounter" with 2+ mob packs at once, it lags for a second or two before the battle starts. Not sure if it intended or not since I haven't noticed much lag in the actual game/battles.)