#1 is pretty important
"[04:12:32]zanzarino: Not because graveyard is not a good idea it's just
[04:12:37]zanzarino: Soo common
[04:12:49]zanzarino: We can do better"
The reason it's common is that it is useful - almost necessary. If you can do better, what is that better thing?
At the very least, how about leaving played cards visible until the player's next turn?
Zanz was talking about a graveyard in which cards can be retrieved. As to leaving played cards visible, that does occur.
1 - Imo, this would make Elements look tacky. (Pokemon is cool, but Elements doesn't need its own 'MINDFLAYER USED LOBOTOMISE. IT'S VERY EFFECTIVE.') Also, I don't think this is necessary if you pay close attention, and this comes from a girl who spent her first week playing Elements without realising creatures had attack and health.
2 - It'd be nice, but it's not necessary. We just need a wiki update, and the link to the wiki to be updated as well.
3 - As explained above, this is easily abused and Zanz would never go for it.
4 - See 1. We don't need Elements to become another MTG or whatever this is based on.
5 - See 2.
6 - Nice idea, but Elements is, and will always be, a CCG.
7 - It'd make the Bazaar cluttered, imo, and it's unnecessary. Zarathustra has it pretty spot on - it already warns for a rare card. (Neat trick - refresh or exit the page while still on the bazaar to stop it saving unwanted sales. You'll get your cards back)