I am actually sick of seeing pilots hesitating during taxy at simple airports making up their mind where to go next. I don't mind a performance based decision smartly executed, if that's what it it might have been, but it wasn't.
If only I had the powers to know what was going through other people's minds I might be able to make such pronouncements.
The reason for hesitation during taxying are many and varied - and if it is a matter of working out where to go next, I'd rather that than the aircraft heading off across a runway or whatever.
As for your concerns about the intersection take-off, I suggest you write to the Ops Director of the airline concerned expressing your views - and your professional competence for doing so - and I am sure that your concerns will receive the consideration they deserve.
PS - I guess it wasn't at LCY this time!