I voted for the original Echov1 by mistake forgetting about the fps issues. It's a great map visually and functionality wise, it had a lot of depth and featured a lot more vertical combat than most maps. Echo I feel was really good for Objectives as it really pushed flanking routes and working together to hold objectives. Now, this does draw some flaws when we look at the current state of the player-base and server. Notably, basecamping was pretty bad on Echo.
This spot alone could almost entirely stop US exiting from a single gate, and could only really be stopped with having a player sit in the base tower. Why do I bring up basecamping? Well its good to note for every map though considering the current player-base decides to rush bases within the first two min of wars, spots like this can be problematic, especially with how large the map is, making getting to OBJs longer than on charharikar(this is mainly due to the mix of mountains, water that provide cover but at the expense of speed).
Another thing I'll note, that I mostly see on Charharikar and don't remember much on Echo is fog. Fog is pretty aids, all you need is someone at a cheeky spot at your max render where they have something behind them and you literally just cannot see them since they blend in with the fog. I think this is mainly a problem on charharikar cause of the colors of the fog mixed with the background (it's a lot of browns,blacks,greys).
Also lets not just have a single post to determine a map change like before. That ends to a lot of 1 sided reception and not the full picture. I.e someone could really fucking hate charharikar and never played on Echo, but has played on CSD and has an opinion on it but can only vote for Echo/Charharikar.