I think more than 8 slots can be done, you just cant switch to them. However, that isn't a problem. You'll only get in them if the rest are full, and you can still swap to the pilot and gunner seats.
The whole point of the YT is that it is versatile, and it is a cargo ship. The falcon had two turrets but could only carry a few passengers. This version strips out some of the internal walls and cargo space to add seats. Also, would you like to fly a large ship with a massive blind spot from underneath?
The Titan thing has been discussed, and its unlikely as only the commander can move Titans, and such a fast ship will cause lag. Instead, it will have a partial interior, where you must go up the docking ramp before you can enter the vehicle.
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If I should die, think only this of me:
That in some corner of a foreign field
There lies a plagiarist.