First off, I hope FFG puts together an app feedback forum, like they did with the Quest Vault and the Battlelore Scenario Builder.
That said, I've been playing RtL a bunch, really enjoying it, and looking forward to more quests and options.
But I came across a few problems:
1. At one point, the map became non-responsive. I couldn't tap on any locations to start new quests or go to the city. This happened the second time through the Rise of the Goblins campaign. I was able to tap on the other controls (look at skills, inventory, etc), but the map locations did not work. I finally uninstalled the app, and reinstalled it, but I had lost all my data, so that was a little annoying.
2. I added a expansion (Lair of the Wyrm) to my collection, and then removed it. After I did so, monsters from the expansion (the Fire Imps) still popped up in a quest.
3. Not a bug, but a question - when the app hits you with one of the perils, I think 10,000 teeth or something like that, and you have to a spider adjacent to every hero, it doesn't specify what type of spider. Are they all minions? Do they follow group limits - add a master first and then minions?
Overall, I think Road to Legend is great, and look forward to seeing more from this app.