Nice software, but ... buggy?

I recently downloaded the software. And it's awesome, though there is a couple of stuff that could really improve it, and then there's downright buggy. My issue is really that the software is "mature (but developing all the time)", and some really basic stuff is out of place.
Where to start?
Ran out of time, but I think we should focus on fixing the UI up a bit.
Where to start?
- Deck building in quest mode (and draft and sealed deck). If I add a card to my deck, and filter on a colour, and unfilter, the card is back in my pool as well as my deck.
- Phases are unintelligent. I know I should play better (and Forge forces me to play better), like I should declare what I want to do before paying for it. But I've always tapped first... in real life tapping 8 mana just makes the opponent wonder "what's coming?!".
- I'm sure you all know that some cards are buggy, and stops working properly. Can we get a "solid" version of the game, where everything works, but perhaps have less cards.
- User interface is generally ... unintuitive. Keep windows the same size, make things like the red X at the top right function, rather than making me find the "return to the main menu" button.
- The enemy's health is not displayed properly (20 looks like 0, 14 like 4 etc.) (on my screen)
Ran out of time, but I think we should focus on fixing the UI up a bit.