Personally I think join in progress would occasionally be helpful when teammates have to bail. Or are jerks, but ultimately this combined with CSR means that people will, on balance, prefer the predictability that no JIP will bring. The CSR experience, which will work on basically any phone, will work basically exactly the same as Halo 3, but you simply glance at your phone or other smartglass device to see your current skill rank. This may be marginally less simple than seeing it in game, but the fact that it will male CSR less appealing to scumbags and de-rankers is well worth the 'inconvenience' of looking at your phone.
This is the beginning of some other competitive efforts we will be spending time on this year.
I checked and I can't get smartglass on my old iPod touch. I'm getting a new one in march but still.
OOOH LAWD JESUS OH JESUS GET DA WATER *****! IT GOING DOWN! DEM MOTHER******* BOOTLEG FIREWORK ****! OH ****! wooo