When I play this game I can not help but think how better it would be if you could pick up and move the cards on the screen and change their order as they cycle to the right. In this fashion you could grab card about to drop off the screen and move it to the left. This would allow for a building of combinations while still keeping the gameplay fast paced.
I understand the desire to weigh the impending loss of a card against its AP cost, but too often you do not have a proper use for that card. By allowing us to move cards you would still have to balance the risk but it adds in an additional element of saving AP for combos and the loss of time building the combination. You could simply have a card hold mechanic, but I figure moving the cards adds time as another sacrifice the person building the combo must make and bigger combos would be harder to maintain.
Still wish this game was more inline with the robot building in original "The Bureau of Steam Engineering" but I am still having a blast. The artwork is awesome.