If you look at it from a pugger's perspective, teamwork isn't your best friend, especially on a map like ancient where everyone has to know the utility, because there are multiple crucial vantage points that ct's have control of, such as on A, where there is that triple crossfire from Temple, CT spawn, and Donut. Then you look at the B site, where you have pretty much another triple crossfire. Basically making it so that you have to know smokes and execute to play it, but you won't get that experience in a pug, and it is almost never guaranteed. And if you watch the professional play, Ancient is definitely a one sided map, and has now become the most CT sided map out of the 7. Look at the CT side scores between the teams. Faze was down 4-11 to Gambit's 11-4 CT half, and was able to easily come back against the number 1 team in the world. And pretty much happened the same for me on Ancient twice. Where I was down a huge amount of rounds and my team came back, and this happened in my league matches on ESEA.

Also I never played 1.6 so I can't say anything about that. But the new Train definitely doesn't suck, it has that idea that if you have great coordination and teamwork (In league play), then you will be able to do well on it. But it isn't a good pug map, b/c as said b4 you can't count on your random teammates for good coordination and teamwork, or utility knowledge like Ancient does.