First impressions as I get them:
* Hangs when I try to import my current character.
* Hangs when I try to recover my current character from the crash.
* Trying to recreate him from scratch. Choosing a class, scrollwheel doesn't work. Major, major UI fault.
* The pop-up bubbly thing when choosing an option annoys me, though I may get used to it eventually. Currently feels like needless bling.
* Making a Lv12 Dragonborn Sorcerer; I get two buttons labeled "Choose a Dragon Breath option". Bug? No, one is for an ability score, one is for elemental type. A clear case where the older CB's transparent options worked a bit better from a clarity standpoint.
* Ability scores. No way to drag/drop to swap them, from what I can tell. Dropdown box for choosing level up abilities is still a terrible interface for it. Seriously, give me a horizontal list of "STR CON DEX INT WIS CHA" and let me click two of them. The way it shows primary/secondary stats for a class is brilliant; make use of that innovation, please.
* Want to do skills later, heading to Feats instead.
* AUGH WALL OF GREEN BUTTONS. And they're too wide for the column, even.
* When searching by name for an element: if the search returns a unique result, hitting enter should select that option and close the popup. it doesn't.
* A rare moment of UI working as I expect: double-clicking a selected feat lets me reselect it.
* The skill choosing interface is juuust shy of excellent: I've multiclassed paladin, and if I check History first (i.e., as a Sorcerer skill behind the scenes) I can't choose Athletics as my last choice, but if I do it the other way around (History as my last choice) I can.
* Feat-related options in the feat section is good; would be better if the option were directly below the feat chosen rather than at the bottom. Also, having the Powerful Breath choice ALSO shown on the racial tab would be nice.
* Can't find a way to add bonus feats. When they said "no houserule support", they weren't kidding.
* Can't figure out how to attach a dragonshard augment. "Equip Selected" is clickable, but has no apparent effect.
* Shopping feels weird. More on this later.
* Can't find my bonus breakdown on my Dragon Breath damage. Can't find the Dragon Breath power at all, actually. Except on the character sheet as a power card.
* Dragon Breath power card is immensely unsuited to actual play. Card doesn't reflect ability score/element choices made, still has the "Special" section.