I agree.
They seem to have chosen only a few of the plotlines though, letting the others rest.
So far the Cersei-plotline is the most obvious rush attempt (the first scene in this season basically confimed that they want to focus on this).
But a lot of things may end up getting lost along the way.
E.g. I assume we won't be seeing
Quentyn "Hiccup Horrendous Haddock III" Martell (see if anybody gets the reference), who is relevant in Dany's plotline. I actually liked how his stuff played out in the books.
..either
Then again, a lot of the changes make things interesting for me, e.g. the Brienne/Sansa stuff (now with less Mance) and I guess the absence of a certain Lady S. may even keep the next book (if it ever happens) interesting to read.