The "Hardcore tactical shooter" now has a project name (though this is not the final title) and a new video and some info was put up as well as artwork on their Kickstarter page. http://www.kickstarter.com/projects/355932838/crowdsourced-hardcore-tactical-shooter
Aside from Ground Branch, this seems to be the only spiritual successor to SWAT 4/Raven Shield in the works. If you liked those games you might want to look into the project and perhaps donate some to help reach the $200,000 goal. If they don't make their goal you get your money back.
Going from the forums, Serellan seems like a nice person who really wants to see another true PC based tactical shooter (not those GRAW/Vegas type games) made. I'm going to pitch in $15 in a little bit as it gets me the full game (assuming they get the $200,000). Raven Shield is great, but it is a bit dated, and SWAT 4 always crashes on all of the computers I ever tried it on. A newer alternative to those games is just what I am looking for.
I do agree, many developers say they will make a tactical shooter and turn out something like Rainbow 6 Vegas. Though he has stated a few times that while he liked working on GRAW, he does not want to make another game like it. He doesn't want those sci-fi or mainstream game elements to water down this title.