They appear to be moving slowly (W15 was quite progressive I feel) toward their immediate contemporary teams with W16 fairly subtle evolution.
Hard to read the overall grouping though with information available up to now. General paddock opinion would seem to be consistent in pointing at McL as noted front runners. Very close to finding out now though.
A very sharp front end can be a liability at the extremes if track were to be wet (McL observations) as it really puts a premium on rear grip being available to hold onto that. Reduction in track and tyre performance can make that spectacular OR spectacularly demanding of driver skill, but ultimately need tempering in pace in keeping it on track.
Can't wait to find out who's where though. A much anticipated season is about to begin.