1/ Alleged RT transcripts are bollocks, KL ATC and MH crews do not use such phrases EVER. In my experience working for MH and flying around Asia for the last 25 years is that MH crews have some of the best RT discipline I've heard.
2/ FL350 for this particular flight is not unusual, don't forget it always subject to ATC clearance regarding FL availability.
3/ reaching FL350 in 20 mins is reasonable for a 772ER at their TOW.