Have the devs abandoned it?

bobobobobiy, on Jun 30 2012 - 16:30, said: About half a year ago, I started hearing rumors about a multi-gun system being added to the advantage of the B1, M3 Lee, Maus, etc. The M3 Lee REALLY needs the help
Recently, I heard that it's being dropped by the devs. I check the wiki, and sure enough, the info about the system is deleted from the M3 Lee's page. However, I check the B1's page, and see that it still has info about the system. A few days later, it has even MORE info about it, like being able to take out KV's with it.
Does that mean that the multi-gun system is being dropped, delayed, or what?