Probably not, I did catch mentions of it from credible coders on this very forum in specific posts. I think these were the first few instances where I learned such a proposal exists.http://mugenguild.com/forum/msg.1590744http://mugenguild.com/forum/msg.1309788
Projectile was to allow helpers to behave more like projectiles. For eg hitting a projectile helper would never increment the hitcounter or trigger movecontact. I can't remember the other stuff it was meant to handle. Never implemented though.
I've found these docs on Tagin/TagOut. Use Google Chrome Browser to translate. Its a very rough translation btw.TagIn Sctrl:http://piano999.blog.fc2.com/blog-entry-290.htmlhttps://bluesura.github.io/MUGEN/document/State/TagIn.htmlTagOut Sctrl:https://bluesura.github.io/MUGEN/document/State/TagOut.htmlStandby Trigger:https://bluesura.github.io/MUGEN/document/Trigger/StandBy.htmlZoom Sctrl:https://bluesura.github.io/MUGEN/document/State/Zoom.html
I've also noticed in 1.1 helper's can't read other helper's that they haven't produced while in 1.0 helper's can read any helper that any helper produced.