Hello!
I think the fact that we had 9 maps in the pool impacted my experience with logjam negatively so I was more upset about that than the fact that logjam was in the pool.
I feel that the lobby between last and 2nd is a bit too complicated. If you are in lobby looking towards last I think removing the walkway between "top mid lobby" and right side lobby could make it a bit less complicated. leaving the ramp as the only way between mid and right lobby. But I'm not sure that is an improvement or that it is a problem that the lobby is on the complicated side.
Other than that I quite like the map and personally prefer logjam over any koth map (I freaking hate koth and it makes no sense having 1 map with a different gamemode than the rest of the pool). I think the map has a natural flow (potentially a bit easy to flank on because of the 2 large flanks mid to 2nd.) I love the big open choke between mid and 2nd. Allows for some bigboy bombs.