Colonial - While this map has it's fair share of pathways, the majority of them rely on overly dangerous trick jumps and lead to the same handful of places, more hard routes would definitely improve movement throughout the map. The hard routes that exist currently are also a bit oddly sized, feeling too big for a 4v4 setting, but too small for 8v8. Another big issue is with the death pits inside the map, they don't look like death pits but somewhere safe to land. Aside from the clear movement issues, I quite like this map, there's cover where there needs to be, the weapons on the map work well with it, and it has a very well done visual theme.
Decay - I had trouble finding a real opinion on this map. The biggest problem I had with this map was the spawns, they're completely static, and rather one sided at that. It's an uphill struggle for blue team to leave their spawn area, and if they do manage to get out red team can very easily push them back as there aren't any real "away" spawns, red team also seems to spawn much closer to any power weapons on the map, giving them more of an advantage than they already had. The one good thing I have to say about this map is about the way it looks, it definitely feels like an abandoned military base... Don't know if that's the theme you were going for, but that's what it felt like to Me.
Decrepit - The spawns aren't as bad on this map, though you might wanna pay more attention to which way they're facing, as a lot of them are facing walls and cliffs. The map flows pretty well in terms of movement, however there isn't much indication as to what is and isn't a hole in the ground, especially around the top mid/monolith area. The map looks really good, and it reminds Me a lot of Narrows from Halo 3.
Occultist - I, love, this map. The only negative thing I can say about it is that it's a little too big for 4v4. I think BTB might be a bit chaotic on this map though, so maybe multi-team? I'm honestly not sure what could change about this map to make it better, other than what's played on it. I didn't get to play an objective gametype on it though, so maybe it works better with that.
And that's the end of My feedback. A storm rolled in that night and knocked out My internet, so I didn't get to play on all the maps. (Figures the one time My connection isn't terrible, nature would do something about that.) Sorry if that caused any trouble during the lobby.