VUG, the makers of SWAT 4, have released a video showing how to make quick missions for SWAT 4... they also released a pack of missions they made.
New maps are really what is needed here, (got to wait for the add-on for that), at least some new missions, one with a boatload of bad guys to engage, better then nothing I guess....
http://www.sierra.com/file_list.do?gamePlatformId=1735
(look at the dates to see whats new... video and mission section.
BTW after downloading extra the one file to your SWAT4/Scenario folder... then to play them, pick Quick Mission Maker on the main screen, then load the "mission pack".
Here's a screen of the mission pack loaded, just to show the mission names...
http://www.magnumland.com/images/Scr...k%20Screen.jpg