I missed his first round match in which he gave two bread sticks.but I saw his match against Tsonga in Abu Dhabi. He was serving bombs against him in exhibition match. Most of the first serves were 126+ mph as I saw.
Now come to his movement which was fine against Tsonga , he hit two impossible lobs as I remember.
I am feeling he improved his volleys in break ( he made great BH volley at 4-5, 15-30 down in that match ), though he have nice touch.
Very important factor he is not waiting , he is trying to hit winner or drop shot , aggressively returns. This version of Murray may be more dangerous than 2013 as he couldn't generate power, now back problem is solved and much hard training in Miami makes him Favorite for Wimbledon or USO not AO or RG .