Units sieze the objective, whice mean they hold on to it,  and drop it when route or get wiped. For my understanding, I believe siezed was the general term, but it should of been expand in the mission

In battlefield section it says to reflect the density of a city, so it would reflect your understanding of what a city looks like with terrain. 

Game size: the reason for the off balance, is mainly because the defender has the easier mission. They score pretty much 70% of the time. The attacker has a pretty brutal time tryjng to get to the defenders deployment and surviving. However, if you are an advance player, the attacker role can be really advantageous, you have 6 markers, if you avoid those or use simply maths, you can easily avoid triggering them depriving the defender units the whole game. So you can easily use same point values there.

Theyre jn the walls: unfortunately was really pressed for space, but was hoping the themeing would carry this across. But it would be assume that they have been in that building for some time, and wouldn't need to take the test. But duely noted.

Entanglement: my laziness has caught to me. I used this table from another campaign I'm working on and must of forgotten to changed it over to OPR. It should be stunned.

Swarms: They are deployed in base contact, as if they dropped on them or came from underneath. It so that they make their attacks straight away and then player would make their attacks back if they so choose to. And the missing states see above.

Note for next time - have that second cup of coffee or not be interrupted by the repair man.

Thanks for the feeback