Hi,
I'm relatively new to the game but I use to play other cards game.
(English is not my first language, excuse my mistakes)
Here is a list of what I could see improved.
1 - Having a Discard Pile or an Action Log. Often I see the field abruptly change without understanding what happen. A log or a discard pile would let me see throuh it to reconstruct the sequence of event in my head. It would help to understand the game, the strategy of the opponent and to understand my own mistakes.
2 - I would put a mouse over description for every counter, poison counters and alikes.
3 - I would give the option at the begining of the game to redraw a new hand(minus 1 card) just to avoid starting a game with only 1 or 2 pillars. I would rather loose a card and stard with more pillars.
4 - I would clearly indicate on cards beside each effect if an effect is :
UNIQUE(1 time only)
ACTIVATED(1 a turn)
REPEATABLE(no limit of activation)
TRIGGERED(activated by an event, ex: when a creature die ...)
STATIC(always true ex: all dark creature get +1 +1)
5 - For the effects on creatures and permanent, I would give a detailed description in the mouse over(the one that appear after 2 second of mouse over on creatures)
6 - For the Rare exchange topic. I would create a system that exchange 1for1 and that is based on the stock market. Let me explained. If I have a rare that I don't use. I drop it in an Exchange Box with a rule attach to it (this is rare A and I want rare B). If somebody drop one with (this is rare B and I want rare A) then the exchange is automaticly made without even having to trade/sell or talk to the person. You are still the owned of the rare that you have put in the box until its exchanged, so you chan at any time remove a rare from that box if its still not exchanged. And you can not use a rare in you deck if it is in the Exchange Box. That Box would be in the Bazar section
Thats just an idea.
7 - I would create a section in the Bazar. You just need 1 click to sell a card. I would create a SAFE section where I can put rare and like that I can't sell until I remove it from the SAFE section. An other way to do it is to give an atribute to each card, TREADABLE (yes/no)
Please leave comment of the fesabilily.