The way I see it the only thing Extreme accomplishes is to make Sidehall/Longhall indefensible. The CT's don't even have to enter the building to rescue the hosties in couches, and I think that might be a borderline exploit. What Terrorist isn't going to tie up or otherwise incapacitate his hostages, isn't that why physical contact is required by the CT's to free them? There are very few camping spots on this side now that don't leave you open for enemy infiltration to your rear.

While on the Garage Stair/Mainhall side there are a few other changes. Mainly the addition of the 2nd Longsnipe on the back wall of the courtyard, and the other stairway beside the elevators, which just forces the T's to stick closer to their spawn, because of the lack of campable positions where your back isn't exposed.

You can defend Paper/Storage/Projector Rooms the same way you would in any other Office variation, while sidehall and the hostages in couches are very hard to defend if the CT's come from multiple directions. Which in turn just forces the T's to camp projector with more and more force.

I think in the end what it comes down to is this map was designed for 40-50+ players on a normal public server. It's main goal being to eliminate the tedium of constant massacres in Longhall of rushing CT's by camped T's, by removing any really good camping spots that couldn't be flanked.

You could try moving the set of hostages in couches, but I don't see any really good spot to move them. Unless you wanted to set up a second T spawn point and buyzone. Otherwise it would just turn into a foot race by both teams for them.