Soraka's E Unviable

The meta may change but one thing remains the same in about every League game. Hyper mobility is now a thing and certain supports like Soraka, Sona and Nami are feeling the pressure of this cancerous design. Soraka's "E" - Equinox is an AOE Silence and snares after a few seconds. In theory this is pretty balanced and good design offering a level of counter-play however in practice, nobody will EVER get caught in its snare and will usually dash/blink/charge etc straight past it and onto Soraka. This is here ONLY bit of CC apart from the pathetic slow on Starcall which is stupidly hard to land. Other then that, Soraka offers nothing that adds to the game ((All of which have ridiculously easy CC to land, it might as well be point and click cough *cough)).

So why can't Soraka's E instantly snare when she puts it out? It has limited range already and is the only form of CC that Soraka has and it isn't reliable enough to keep back dash heavy mobility champs ((E.G. )) etc. Can we have a bit less biased in support design. I mean Riot, do you want only 3-4 supports to be viable in this game and the rest are there just for show? already have reliable CC so why not ?