While walking through GG deal list I noticed that e.g. on bundle information I am missing information about whether game does have steam cards or not. It took me some time, to notice that when I hover over features, I will see a tooltip with all other features listed on steam.
I have an idea, that you could turn those feature info/list from text (which in this case looks like "Single Player +5") into simple icons that tell you everything you want to know right away and it would not take much more space I guess. In many case it won't take much more space than "Single Player +5" (but yes, it probably will take a bit more).