No more keywords optimization allowed in app name?

Hey,

I've an app named 'MyApp', and I was happy to change it in iTunesConnect to 'MyApp - Some Text to Explain What MyApp Does, Which Contain Some Import Keywords for Me', It works until the latest update was rejected by review team for metadata :

"App names in iTunes Connect and as displayed on a device should be similar, so as not to cause confusion"

I'm sure that If I change 'MyApp - Some Text to explain ...' to 'MyApp', then my latest update will get approved, so my question is : can we still do keywords optimization in app name? does apple try to remove all those LONG app name in AppStore?

Thanks!