Before I mention the ideas note that if any of them are already out there that I did look but haven't seen these ideas implemented anywhere.

Idea 1 All lights are coloured: Simply the map's lighting is one or multiple colours ideally I say red like as if the lights went out and the emergency red lights had kicked in. This idea mixes things up by making it more challenging to be able to tell at a distance who is friend or foe when the coloured light makes anyone look the same. Maybe make it a system were the lights are normal until a random event occurs where the lights then become one colour.

Idea 2 Glass/slippery surface floor: So anyone familiar with demo's sticky bombs should know by now that they don't stick to most if not all glass surfaces so why not have glass flooring where demos can watch their sticky bombs slide across the field like a hockey puck until they find a none glass surface to stick to. I think it would be interesting to see.

Heck maybe a map with both these ideas together. Here hoping a map maker would like these ideas.