Replying to New Skis, too big..?

Hey so I bought a pair of last years 2013 Armada Pipe Cleaner's (176cm) and I rode them (and skied for the first time this year)

My last skis were afterbangs, but they were 155, so I have to get used to skis 21cm which is like 8 inches. I'm 6ft exactly for reference, i've grown maybe 2 inches from last year using my afterbangs.

I noticed while skiing that it was harder to control them and just move, I fell down riding switch because I couldn't turn.

Is it that the skis are so new that the edges need to be used so it's easier to turn? or are these skis too big for me and I need to complain to the guy that convinced me I need 176 skis. TY