Can I add my two pennies worth...??
The one thing that I find to be a little misleading is 'say present heading'.. you say it, then get no response (admittedly this is more for those across the channel, but still does happen).
Whilst I appreciate that there has been no instruction to maintain this heading, it would be helpful, in my opinion, to say as previously cleared or something similar.. as in some ways it sometimes seems as though you should have been on a heading already, rather than a direct to... just causes a little confusion occasionally (as no doubt the heading will change along track cos of the changing winds).