Can't really review much since it's for Reforged but what I can judge from the screenshots,
- the cards have those large shadows, are they intended to be there?
- maybe make the card model face towards the camera so it doesn't look like its laying on the ground, there is a property in war3 model editor that makes a bone always face directly towards the camera, think it's called Billboarded
- could have better terrain but I assume you have more important things to work on right now
- maybe a multiboard showing current cards per player and cap, instead of text message