I'm not trying to be a downer here, but why does it take over half a year to not only recognize a problem in two of the most popular playlists, but also implement the wrong fix to the problems.
One thing I disliked the most about Slayer Pro was the blandness on most of the maps. The lack of variety in global static weapon spawns(By variety I mean lack of shotguns/snipers/rocket dynamic). If that part has been fixed it's great, but the problem with your update is, Slayer Pro should not be in the main social/casual Infinity Slayer and ISBTB.
No radar makes changes the general gameplay too much for many people, for instance most of the people who I play with are in their mid-40`s and don`t like that level of competition which no radar brings. What you are basically doing is putting Halo 3`s MLG gametypes into Social Slayer.
What I feel should have been done is simply bring in gametypes akin to Team Slayer, or at the very least Social Slayer from Halo 3. They are basically the same, except one being a bit more competitive over the other, but either of them are far more player-friendly.
Lastly, if Slayer Pro had a home to be in, it would be in Throwdown, not BTB and Infinity Slayer.
In other news, when can we hear word of Legendary Slayer? I have a couple friends which refuse to play Halo 4 until "They take AA's out and personal ordinance".
I've been telling them that Legendary Slayer is supposed to be similar to Team Slayer from Halo 3, though I honestly don't know anymore; I just want SOMETHING that plays like it's related, a brother even, to Halo 3's Social or Team Slayer.