Since November, we've had multiple days with full blocks.
Your comment seems strange to me, virtually every block is full, and has been for most of the last year, barring some low times on weekends. This isn't in and of itself a problem.
OK, should I say then, they are "fuller"? According to
this chart it was in November when the average block size passed the 900 kB size regularly. Since then the number of days/hours where we have more than 20.000 unconfirmed transactions in the waiting list is increasing.
In the current situation TX with lower fees mostly get eventually confirmed after a couple of hours, so it "seems" not urgent still, but my point is that in every price rally in the past the transaction volume grew at a higher rate than the normal one - so in the next rally we will probably have severe capacity problems (If the price manages to break the all time high this scenario could be only a couple of weeks ahead.).
PS: I consider it a good thing that Litecoin will enable Segwit before BTC, as I hope that in the case of success the Segwit adoption by miners and nodes could go up in BTC too.